49 Debbie recorded the time it took seven children of different ages to run one lap around the track. Time

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1 Debbie recorded the time it took seven children of different ages to run one lap around the track. Age of Child (ears) Time (seconds) 0 f f--._-_. 0 Using a linear equation of best fit, which is closest to the length of time it should take Debbie's -ear-old niece to run one lap? A B C D 00 sec sec 0 sec 0 sec 0 0 Y 0 I o o 0, X Using the data plotted on the scatterplot, which equation most closel describes a line of best fit for the data? =+ =- =+ =-

2 0-0 0 " - I " , -B - Which equation best represents the data shown on the scatterplot? - Y = - - Y -+ - Y Y " 0. - I, B. -, "I - Which equation best represents the data shown in the scatterplot? =- Y ::- Y + Y -I Connie made a scatterplot comparing the shoulder heights of her friends' dogs to their weights. Connie's dog stands inches to his shoulder. 0 r-,...-,...-,...-,...-,...-,.-,.-...,.-...,.-...,.-...,.-...,.-...,.-...,.--, ~ 0 Q) : 0 co >?-, 0 o o I X value Based on the scatter plot, which value would best match =? A B c D I--l--l--~~ l 0 I--l--~~ l I--l--~ l 0 I--l--~ f--+--l ~ I--t--t t--l Cf) g 0 I--t-t--t--t I E I--t--~ t--l.~ 0 r-t--t--t i--i : I--l--l--~~ l-l 0 f-t-t-t------t--f I--t--l--l--~~ l-l 0 I--t--t--t--t t t--l I--t--t--l--~~ l-l " o '--'--'--~:<.-~"'--...-'--...-'---'---'---'--~ o eight (inches) Using a line of best fit for the plot, which is the best prediction for her dog's weight? 0 pounds pounds pounds 0 pounds

3 Using the median fit method, which scatterplot most likel has a line of best fit represented b = - I? A - - -, 0, 0 Annual Income () " co " () "0 c 0 co () ::: 0 ~ I ;--- o L-~_...L_..L-_.l..--L- -"-_.. Year B, - -:l -'0, Using the data plotted on the scatterplot, which is the best prediction for income in the ear 000?.0/,000,000 0,000,000 c - -, e 0 0 I - D e, , 0 e, - o o 0.., Based on the scatte:rplot, which value would best match,,;: In A B C D \. /

4 The graph represents the relationship between the bags of popcorn sold and the amount of profit made during the Newton onor Societ's popcorn sale. 0 I--f---f---l-----jf I- -- () ' :!::: C'O ;--+- -= o 0 0 t-----t---i----t-----jl i---i a: c c: 0 t-----t---f r--+---i---; :::=.. 0 f---f--~ j' j--i 0 f---+--f j---j-\----j,--i o'----'--'----'-----''---'-----'--' o Bags of Popcorn Which is closest to the minimum number of bags that must be sold to make a $00 profit? h r of best fit for the set of Which is most likel the equation of t e me data points? ~ o --" ] =-+ Y = Y= -+ - Y= -+ dv{.)\o

5 This table shows the wind chill at 0 for various wind speeds. Wind Speed (miles per hour), s Wind Chill (O), t Which equation most closel represents a line of best fit for the data? A B t=-0.s+ f = 0.s- C f =--s + 0. o t = s _..._---_._--_..._ Question: This graph represents how much uan charges to take care of one child. ow much does uan charge per hour? $.00 $.00

6 A deliver service compan maintains several vehicles. The table summarize~ the cost for auto insurance related to the number of vehicles insured. Number of Cost ($) Vehicles, ~.-.._~.._---_..--_..._- /,00 /,00,00.. _",00,00 Using the equation of a line of best fit for the data, which is the closest estimate of the total cost of insuring eight vehicles? $,00 $,00 $,00 $,0 The table shows the life epectanc of a person related to the ear of birth. Year of Birth, Life Epectanc in Years, Which equation would give the best estimate of life epectanc, given the ear of one's birth? Y = 0. + Y = 0. - Y = OAO + Y = OAO -

7 A scientist: dropped an object from a height of 00 feet. She recorded the height of the object in O.-csecond intervals. er data is shown~ eight Of Dropped Object Time eight (seconds) (feet> , , ' t---,,~. 00 Based on a quadratic model~ which best approimates the height at seconds? U B feet o C feet C' D Qfeet The table sbows therelationshi:p between corresponding values of ox' and.,... ; - o To determine tne -v'alue U B subtract from the.t"'value \... C divide the ~valuf; b and add \..,i D divide the.",,--value b and subtract