Unit 3 Multiple Choice Test Questions
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1 Name: Date: Unit Multiple Choice Test Questions MCC9.F.IF. Understand that a function from one set (called the domain) to another set (called the range) assigns to each element of the domain exactly one element of the range. If f is a function and x is an element of its domain, then f(x) denotes the output of f corresponding to the input x. The graph of f is the graph of the equation y = f(x). (Draw examples from linear and exponential functions.) Directions: Determine if the following representations are functions. State Function or Not a Function
2 Multiple Choice Identify the choice that best completes the statement or answers the question.. Give the domain and range of the relation. (F.IF.5) x y a. D: { 5, 0,, 6}; R: { 9, 0, 9, } b. D: { 5,, 6}; R: { 9, 9, } c. D: {, 6, 5, 9,, 9}; R: {0} d. D: { 9, 0, 9, }; R: { 5, 0,, 6}. Determine a relationship between the x- and y-values. Write an equation. (BF.) x y a. y = x 5 b. y = 5x + c. y = x d. y = x 5. For, find f().(f.if., ) a. 0 b. c. d Let be the transformation, vertical translation units down, of. Write the rule for. (BF.) a. b. c. d.. (F.IF.)Find the x- and y-intercepts y x a. x-intercept:, y-intercept: b. x-intercept:, y-intercept: c. x-intercept:, y-intercept: d. x-intercept:, y-intercept:
3 6. Give the domain and range of the relation. a. D: {,, 5, 9}; R: {0,, 8} b. D: {0,, 8}; R: {,, 5, 9} c. D: ; R: d. D: ; R: 7. Clayton has 65 stamps in her collection. To expand the collection, he is planning to buy some books of stamps that have 6 stamps each. All of the books cost the same. Clayton is not sure yet about the number of books of stamps he wants to buy, but he has enough money to buy up to 5 of them. Write a function to describe how many stamps Clayton can buy. Let x represents the number of books of stamps Clayton buys. Find a reasonable domain and range for the function. a. ; D: {0,,,, }; R: {65, 8, 97,, 9} b. ; D: {5}; R: {5} c. ; D: {,,, }; R: {8, 97,, 9, 5} d. ; D: {0,,,,, 5}; R: {65, 8, 97,, 9, 5} 8. Find the rd term in the arithmetic sequence,, 9, 7, 5,... a. 79 b. 57 c. 76 d Sylvie is going on vacation. She has already driven 6 miles in one hour. Her average speed for the rest of the trip is 6 miles per hour. How far will Sylvie have driven 6 hours later? a. 76 miles b. 66 miles c. 8 miles d. 0 miles 0. Tell whether the set of ordered pairs satisfies a linear function. Explain. a. No; there is a constant change in x that corresponds to a constant change in y. b. No; there is no constant change in x that corresponds to a constant change in y. c. Yes; there is a constant change in x that corresponds to a constant change in y. d. Yes; there is no constant change in x that corresponds to a constant change in y.
4 . Find the slope of the line described by x + y =. a. b. c. d.. Find the x- and y-intercepts of. a. x-intercept: 5, y-intercept: 9 b. x-intercept: 6, y-intercept: 0 c. x-intercept: 5, y-intercept: 0 d. x-intercept: 6, y-intercept: 9. Find the slope of the line. a. b. c. d.
5 . Tara creates a budget for her weekly expenses. The graph shows how much money is in the account at different times. Find the slope of the line. Then tell what rate the slope represents. Amount ($) (, 00) (, 000) a. The slope is. The slope means that the amount of money in the account is decreasing at a rate of $50 every week. b. The slope is 50. The slope means that the amount of money in the account is increasing at a rate of $50 every week. c. The slope is. The slope means that the amount of money in the account is decreasing at a rate of $0.0 every week. d. The slope is. The slope means that the amount of money in the account is decreasing at a rate of $50 every weeks. 6. The water level of a river is feet and it is receding at a rate of 0.5 foot per day. Write an equation that represents the water level, w, after d days. Identify the slope and y-intercept and describe their meanings. In how many days will the water level be 6 feet? a. The slope is, and this is the rate at which the water level is receding. The y-intercept is 0.5, and this is the water level after 0 days. In 6 days, the water level will be 6 feet. b. The slope is, and this is the rate at which the water level is receding. The y-intercept is, and this is the water level after 0 days. In 0 days, the water level will be 6 feet. c. d The slope is, and this is the rate at which the water level is receding. The y-intercept is, and this is the water level after 0 days. In 0 days, the water level will be 6 feet. The slope is Time (weeks), and this is the rate at which the
6 water level is receding. The y-intercept is, and this is the water level after 0 days. In 6 days, the water level will be 6 feet. 7. Let be the transformation, vertical translation units down, of. Write the rule for. a. b. c. d. Use the following context to answer questions 8-9. (F.BF., F.BF.a, F.IF.) Carlos begins with 8 baseball cards in his collection one month. Each month, he increases his collection by baseball cards. The table below shows the month number and the number of cards in Carlos collection. Month Number Number of Baseball Cards Express the function of Carlos baseball cards as a sequence in explicit form. a. a n = n + 6 b. a n = n + c. a n = n + 8 d. a n = n Express the function of Carlos baseball cards as a sequence in recursive form. a. a n = a n + 6 b. a n = a n + 6 c. a n = a n + d. a n = a n
7 (CCGPS: F.BF.) 0. Given the recursive form of the following function, determine the first terms in the sequence. a = a.,, 6, 9 b.,, 9, 7 c.,,, d.,, 7, 0 a n = an. Given the explicit form of the following function, determine the first terms in the sequence. a n = n + a.,,, 0 b. -,, 5, 8 c.,, 0, - d.,,, Use the following context to answer questions -. (CCGPS: F.BF., F.BF.a, F.f. 7e, F.LE., F.LE.) John took a sample of water from the pond behind his house. On the first day, he found bacteria in the sample. Each day that amount tripled. The table for one week of bacteria growth is in the sample is shown below. Day Number of Bacteria Can this problem situation be described as a linear function or exponential function? How do you know? a. Linear, because the common ratio is. b. Linear, because the common difference is. c. Exponential, because the common ratio is.
8 d. Exponential, because the common difference is.. Write an explicit rule for the problem situation from above. a. a n = n b. a n = n c. a n = n d. a n = n +. Write a recursive rule for the problem situation above. a. a n = 9a n b. a n = a n c. a n = a n + d. a n = a n The following two functions are graphed below. Use them to answer questions 5-7. (CCGPS: F.LE.) f( x) = x+ x gx ( ) = + g(x) f(x) 5. What type of function is f(x) and how do you know?
9 a. Exponential, because there is an x in the equation. b. Linear, because the rate of change is constant c. Exponential, because the variable is exponent. d. Linear, because there is an x in the equation. 6. Which one of the following characteristics is true for both f(x) and g(x). e. They both have a constant rate of change. f. They both have a y-intercept of (0, ). g. They both are decreasing over all x-values. h. The both have a range of all real numbers. 7. What is the range of g(x)? i. [, ) j. (, ) k. All real numbers l. (0, ) Given the functions f( x) = 5x and gx= ( ) x, answer questions 8-0. (CCGPS:F.BF.b) 8. Find f() + g(). a. 9 b. c. 7 d Find g() f(). e. 0 f. g. 0 h Find f(x) + g(x). i. x j. 5x + x k. 5x + x l. 5x x (CCGPS: F.BF.)
10 . Sarah graphed the equation, f(x) = x on the coordinate plane below. Her partner graphed g(x) on the same coordinate plane below. Find the function equation for g(x). m. g(x) = x + n. g(x) = x o. g(x) = x p. g(x) = x. Given the function f(x) = x, find a function for g(x). q. g(x) = x r. g(x) = x + s. g(x) = x t. g(x) = x. If the original function is f(x) = x, and you shifted it to the right 5. What would be the correct equation for the new, transformed function? u. f(x) = x 5 v. f(x) = 5 x w. f(x) = x 5 x. f(x) = x+5 Forevermore is a band made up of of your friends. They have recorded a CD and would like to burn CDs to sell. They found two recording companies that will make a master CD and design the cover art, then make
11 copies of the CDs. Company A charges $00 to make the master CD and design the cover art and an additional $ per CD to make copies. Company B charges $5 per CD with no initial charge for the master CD and cover art. (A.REI.0, A.REI.. F.IF., F.IF.7, F.IF.9, F.BF.). Which equation represents the total cost, C, of using company A if x represents the total number of CDs produced. a) C = 00x + b) C = x + 00 c) C = 5x + 00 d) C = 05x 5. Give the total cost Forevermore must pay if they record 75 CDs using each company. a) Company A: $7,50; Company B: $7,875 b) Company A: $5; Company B: $75 c) Company A: $5; Company B: $75 d) Company A: $00; Company B: $ Which below shows the correct table of values for Company A? a. Number of burned CDs Total Cost b. Number of burned CDs Total Cost c. Number of burned CDs Total Cost Which of the following is false about the graphs the number of CDs and total cost for each company? a) Both graphs have a positive rate of change (slope)
12 b) Company A has a y-intercept at (0, 00) and Company B has a y-intercept at (0, 0). c) Their intersection point is where the amount of CDs ordered costs the same for each company. d) The graphs do not intersect. 8. If you are ordering more than 50 CDs, which company would be the cheapest? a) Company A b) Company B 9. Which mapping below represents a function? a) Mapping A b) Mapping B A B Given functions f( x) = x and gx= ( ) x. (F.IF., F.IF.) Find: Answer Choices: 0. f ( ) a) 8. g () b) -7. f( m ) c) m-. Which of the following models an exponential function? (F.LE.) a) Stew gets paid $ per hour to cut grass b) A pool pumps out water at 700 gallons per minute c) A culture of bacteria doubles every half hour d) You lose $5 for every math question you miss
13 8. Which is the graph of the following function: f( x) = x (F.IF.7, F.IF.7a) y y x x 5 5 a) b) y y x 5 x 5 c) d) Use the following function for questions 8-9 f( x) = x 9. The rate of change is. a) constant b) variable 50. What happens to the end behavior on the right side of f( x )? a) as x increases, f(x) increases towards infinity b) as x increases, f(x) decreases towards negative infinity c) there is no correlation between x and f(x)
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