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1 STAAR State of Teas Assessments of Academic Readiness GRADE 8 Administered March 2017 RELEASED Copright 2017, Teas Education Agenc. All rights reserved. Reproduction of all or portions of this work is prohibited without epress written permission from the Teas Education Agenc.

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3 STAAR GRADE 8 MATHEMATICS REFERENCE MATERIALS LINEAR EQUATIONS STAAR State of Teas Assessments of Academic Readiness Slope-intercept form = m + b Direct variation = k Slope of a line CIRCUMFERENCE 2 1 m = 2 1 Circle C = 2πr or C = πd AREA 1 Triangle A = bh 2 Rectangle or parallelogram A = bh 1 Trapezoid A = (b + b )h Circle SURFACE AREA Lateral Prism S = Ph S Clinder S = 2πrh VOLUME 2 A = πr Prism or clinder V = Bh Total = Ph + 2B S = 2πrh + 2πr 1 Pramid or cone V = Bh 3 Sphere V = ADDITIONAL INFORMATION Pthagorean theorem 4 3 πr a + b = c Simple interest I = Prt Compound interest t A = P (1 + r) 2

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7 Page 7 MATHEMATICS

8 DIRECTIONS Read each question carefull. For a multiple-choice question, determine the best answer to the question from the four answer choices provided. For a griddable question, determine the best answer to the question. Then fill in the answer on our answer document. 1 Which graph shows a non-proportional linear relationship between and? A C B D Page 8

9 2 The coordinate grid shows a pentagon. The pentagon is translated 1 unit to the left and 10 units down to create a new pentagon Which rule describes this transformation? F (, ) ( 1, 10) G (, ) ( + 1, 10) H J (, ) ( 1, + 10) (, ) ( + 1, + 10) Page 9

10 3 Two numbers are shown on the number line π Which value is NOT located between these two numbers on the number line? A π B 9 C D π 9 π 2 9 Page 10

11 4 A water hose discharges water at a rate of 45 gallons per minute. Which graph has a slope that best represents this rate? Discharge Rate Discharge Rate F Amount of Water (gallons) Time (minutes) H Amount of Water (gallons) Time (minutes) Discharge Rate Discharge Rate G Amount of Water (gallons) Time (minutes) J Amount of Water (gallons) Time (minutes) Page 11

12 5 Triangle MNP is graphed on a coordinate grid with vertices at M ( 3, 6), N (0, 3) and P (6, 3). Triangle MNP is dilated b a scale factor of u with the origin as the center of dilation to create triangle M NP. Which ordered pair represents the coordinates of the verte P? A (6 + u, 3 + u) B C 6 3 (, ) u u 1 1 (6 +, 3 + ) u u D (6u, 3 u ) Page 12

13 6 The table shows the number of gallons of gasoline in a car s gas tank after the car has been driven miles. Gasoline Usage Miles Driven, Gallons of Gasoline in Tank, When these data are graphed on a coordinate grid, the points all lie on the same line. What are the slope and -intercept of this line? 1 F Slope =, -intercept = G Slope =, -intercept = H Slope = 25, -intercept = 375 J Slope = 25, -intercept = 15 Page 13

14 7 A clinder and its dimensions are shown in the diagram. 5 in. h in. Which equation can be used to find V, the volume of the clinder in cubic inches? A V = π (2.5 h) 2 B V = π (5 h) 2 C V = π(2.5) 2 h D V = π(5) 2 h Page 14

15 8 The approimate volume in milliliters, m, for a volume of f fluid ounces is equal to times the value of f. Which table represents this relationship? Liquid Volume Liquid Volume Fluid Ounces, f Milliliters, m Fluid Ounces, f Milliliters, m F H Liquid Volume Liquid Volume Fluid Ounces, f Milliliters, m Fluid Ounces, f Milliliters, m G J Page 15

16 9 The manager of a car dealership wants to attach a rope with flags to the top of a pole and to a stake in the ground, as shown in the diagram. 26 ft Stake 19.5 ft Based on the diagram, what is the distance in feet from the top of the pole to the bottom of the stake? Record our answer and fill in the bubbles on our answer document. Be sure to use the correct place value. Page 16

17 10 The scatterplot shows the number of people in each of 8 different households and the average amount of mone each household spent on groceries. 320 Weekl Grocer Epenses Average Amount Spent on Groceries (dollars) Number of People in Household Based on the scatterplot, what is the best prediction of the average amount of mone spent on groceries for a household that has 7 people? F \$240 G \$190 H \$210 J \$300 Page 17

18 11 Which graph does NOT represent as a function of? A C B D What value of makes this equation true? 3 = F 3 G 9 H 1 J 27 Page 18

19 13 An eighth-grade student estimated that she needs \$8,800 for tuition and fees for each ear of college. She alread has \$5,000 in a savings account. The table shows the projected future value of the account in five ears based on different monthl deposits. Future Value of a Savings Account Initial Balance (dollars) \$5,000 \$5,000 \$5,000 \$5,000 Monthl Deposit (dollars) \$100 \$200 \$300 \$400 Account Value in Five Years (dollars) \$12,273 \$18,737 \$25,202 \$31,667 The student wants to have enough mone saved in five ears to pa the tuition and fees for her first two ears of college. Based on the table, what is the minimum amount she should deposit in the savings account ever month? A \$200 B \$300 C \$100 D \$400 Page 19

20 14 A clinder and its dimensions are shown in the diagram. 8.4 cm 10.9 cm Which measurement is closest to the lateral surface area of the clinder in square centimeters? F cm 2 G cm 2 H cm 2 J cm 2 15 Two eighth-grade classes are selling raffle tickets to raise mone. One class is selling tickets for \$2.50 each and has alread raised \$350. The other class is selling tickets for \$3.00 each and has alread raised \$225. Which equation can be used to find t, the number of tickets each class needs to sell so that the total amount raised is the same for both classes? A 3t = 2.50 t B 350t = 225t + 3 C 2.50 t = 3t D Not here Page 20

21 16 Mr. Wilkins deposited \$2,500 in a new account at his bank. The bank pas 6.5% interest compounded annuall on this account. Mr. Wilkins makes no additional deposits or withdrawals. Which amount is closest to the balance of the account at the end of 2 ears? F \$2, G \$2, H \$2, J \$2, Figure ABCDE is similar to figure VWXYZ. C V A B D Z W X E Y Which proportion must be true? A B C D AE XY = CD VZ AB VW = YZ DE BC XY = DE YZ AB VW = CD XY Page 21

22 18 The mass of a tetbook is approimatel metric ton. How is this number written in scientific notation? F G H J The graph shows the relationship between the cost of some pecans and the weight of the pecans in pounds. Pecans Cost (dollars) Weight (pounds) Which function best represents the relationship shown in the graph? A B = 5 1 = 5 C D = 2 1 = 2 Page 22

23 20 Pentagon MNPQR is shown on the coordinate grid. Pentagon MNPQR is dilated with the origin 1 1 as the center of dilation using the rule (, ) (, ) to create pentagon MNPQR Q P R N M Which statement is true? F Pentagon M NP Q R is larger than pentagon MNPQR, because the scale factor is greater than 1. G Pentagon M NP Q R is smaller than pentagon MNPQR, because the scale factor is less than 1. H Pentagon M NP Q R is smaller than pentagon MNPQR, because the scale factor is greater than 1. J Pentagon M NP Q R is larger than pentagon MNPQR, because the scale factor is less than Clarissa needs a \$2,500 loan in order to bu a car. Which loan option would allow her to pa the least amount of interest? A An 18-month loan with a 4.75% annual simple interest rate B A 30-month loan with a 4.00% annual simple interest rate C A 24-month loan with a 4.25% annual simple interest rate D A 36-month loan with a 4.50% annual simple interest rate Page 23

24 22 Point J ( 4, 6) and point K (4, 4) are located on a coordinate grid Which measurement is closest to the distance between point J and point K in units? F 18 units G 6 units H 13 units J 9 units 23 A rectangle s perimeter and its area have the same numerical value. The width of the rectangle is 3 units. What is the length of the rectangle in units? Record our answer and fill in the bubbles on our answer document. Be sure to use the correct place value. Page 24

25 24 A cone and its dimensions are shown in the diagram in in. Which measurement is closest to the volume of the cone in cubic inches? F in. 3 G in. 3 H in. 3 J in. 3 Page 25

26 25 Which set of ordered pairs represents as a function of? A {(2, 5), (3, 1), (2, 1), (4, 7)} B {(3, 2), (4, 3), (5, 2), (2, 6)} C {(1, 3), (3, 5), (2, 5), (1, 6)} D {(4, 7), (4, 6), (4, 4), (4, 1)} 26 When three squares are joined at their vertices to form a right triangle, the combined area of the two smaller squares is the same as the area of the largest square. Which three squares do NOT support this statement? 21 cm 25 cm 2 F 3 cm H 4 cm 9 cm 144 cm 2 13 cm 100 cm 2 G 5 cm J 6 cm 64 cm 2 12 cm Page 26

27 27 A circle is graphed on a coordinate grid and then reflected across the -ais. If the center of the original circle was located at (, ), which ordered pair represents the center of the new circle after the transformation? A (, ) B (, ) C (, ) D (, ) 28 Leanor pas a total of \$16.50 for ever 6 shirts she has dr-cleaned. Which graph models a relationship with the same unit rate? F H G J Page 27

28 29 An inequalit is shown. Which value of makes the inequalit true? 1 8 < < 18% A 1 5 B 1.6 C 0.09 D 0.02 Page 28

29 30 Triangle MNP and triangle JKL are similar right triangles N 9 8 M J K L P Which proportion can be used to show that the slope of JL is equal to the slope of MP? F 0 ( 7) 4 ( 4) = 4 ( 10) 8 ( 1) G ( 7) = ( 10) H 0 ( 4) 4 ( 7) = 4 ( 1) 8 ( 10) J 4 ( 7) 0 4 = 1 ( 10) Paula completel covered a square wall using 87.5 ft 2 of wallpaper without an overlap. Which measurement is closest to the side length of this wall in feet? A 22 ft B 44 ft C 9ft D 7ft Page 29

30 32 Ben collected data from a group of 12 people. He measured each person s resting heart rate and recorded the average number of hours each person eercised per week. He created a scatterplot to show the data he collected. Resting Heart Rate and Weekl Eercise Resting Heart Rate (beats per minute) Average Weekl Eercise (hours) Based on the scatterplot, what is the best prediction of the resting heart rate, in beats per minute, of a person who eercises an average of 8 hours each week? F 30 beats per minute G 50 beats per minute H 55 beats per minute J 60 beats per minute Page 30

31 33 A right triangle and two of its side lengths are shown in the diagram. 12 cm 39 cm cm Which measurement is closest to the value of in centimeters? A B C D 37.1 cm 40.8 cm 27 cm 51 cm 34 The number of gift baskets Nikki can make varies directl with the amount of time she spends making the baskets. She can make 4 baskets in 1 2 hour. How man baskets can Nikki make in 5 hours? Record our answer and fill in the bubbles on our answer document. Be sure to use the correct place value. Page 31

32 35 Mr. Flores opened an account with a deposit of \$5,000. The account earned annual simple interest. He did not make an additional deposits or withdrawals. At the end of 4 ears, the balance of the account was \$6,500. What is the annual interest rate on this account? A 5.8% B 7.5% C 3.3% D 1.9% Page 32

33 36 Quadrilateral FGHJ was dilated with the origin as the center of dilation to create quadrilateral F G H J G F 10 8 G 6 F J J H 16 H 18 Which rule best represents the dilation that was applied to quadrilateral FGHJ to create quadrilateral F G H J? F 5 5 (, ) o (, ) 7 7 G (, ) o ( + 1, + 2) H (, ) o (1.4, 1.4 ) J (, ) o ( 2, + 1) Page 33

34 37 Melissa is saving \$25 that she earned for washing her mom s car. She earns \$10 ever week for doing chores, which she also saves. Which function can be used to find t, the amount of mone Melissa will have saved at the end of n weeks of doing chores? A t = 10n + 25 B t = 25n + 10 C t = 35n D t = 15n 38 A rectangular prism and its dimensions are shown in the diagram. 6.5 in. 7.5 in. 5 in. What is the total surface area of this prism in square inches? Record our answer and fill in the bubbles on our answer document. Be sure to use the correct place value. Page 34

35 39 Emil sells greeting cards. The graph models the linear relationship between the number of boes of cards she sells and her profit. Selling Cards Profit (dollars) Number of Boes Which of these best describes the profit Emil makes from selling these cards? A \$7.50 per bo B \$10.00 per bo C \$4.00 per 30 boes D \$3.00 per 4 boes Page 35

36 40 The dail attendance at a bowling alle was recorded for 15 das. The scatterplot shows the number of lanes rented each da and the number of people who bowled that da. Bowling Alle Data 70 Number of People Bowling Number of Lanes Rented Which statement is best supported b the scatterplot? F There is a non-linear association between the number of lanes rented and the number of people who bowl. G There is a negative linear association between the number of lanes rented and the number of people who bowl. H There is no apparent association between the number of lanes rented and the number of people who bowl. J There is a positive linear association between the number of lanes rented and the number of people who bowl. Page 36

37 41 A container that holds sugar is shaped like a clinder. The radius of the container is 3 inches, and the height of the container is 10.5 inches. Which measurement is closest to the volume of the container in cubic inches? A in. 3 B in. 3 C in. 3 D in Frank and Erica are selling ribbons to raise mone for the football team. The graph shows the linear relationship between the number of ribbons each of them has left to sell and the number of das that the have been selling ribbons. Ribbon Sales Number of Ribbons Left to Sell Erica 0 6 Frank Das On which da does it appear that Frank and Erica will have the same number of ribbons left to sell? F Da 15 G Da 48 H Da 33 J Da 18 Page 37 BE SURE YOU HAVE RECORDED ALL OF YOUR ANSWERS ON THE ANSWER DOCUMENT. STOP

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