Comparing Graphs

ID: nuzuf-livol
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Created by Illustrative MathematicsIllustrative Mathematics, CC BY 4.0
Subject: Algebra, Algebra 2
Grade: 8-9
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22 questions

Comparing Graphs

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Problem 1

Functions RR and DD give the height, in feet, of a toy rocket and a drone, tt seconds after they are released.

Here are the graphs of RR (for the rocket) and DD (for the drone).

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Write each statement in function notation:

1) At 3 seconds, the toy rocket is higher than the drone.

2) At the start, the toy rocket is 25 feet above the drone.

Problem 2

A(t)A(t) is the average high temperature in Aspen, Colorado, tt months after the start of the year. M(t)M(t) is the average high temperature in Minneapolis, Minnesota, tt months after the start of the year. Temperature is measured in degrees Fahrenheit.

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3) Which function had the higher average rate of change between the beginning of January and middle of March?

a)

Aspen

b)

Minneapolis

4) What does this mean about the temperature in the two cities?

Problem 3

Here are two graphs representing functions ff and gg.

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5) Select all\textbf{all} statements that are true about functions ff and gg. Write each corresponding letter in the answer box and separate letters with commas.

a) f(0)>g(0)f(0) > g(0) \quad \quad b) There are two values of xx where f(x)=g(x)f(x) = g(x). \quad \quad c) f(1)<g(1)f(-1) < g(-1) \quad \quad d) f(3)>g(4)f(-3) > g(4)

Problem 4

The three graphs represent the progress of three runners in a 400-meter race.

The solid line represents runner A. The dotted line represents runner B. The dashed line represents runner C.

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6) One runner ran at a constant rate throughout the race. Which one?

a)

Runner A

b)

Runner B

c)

Runner C

7) A second runner stopped running for a while. Which one?

a)

Runner A

b)

Runner B

c)

Runner C

8) During which interval of time did that happen?

9) Describe the third runner's race. Be as specific as possible.

10) Who won the race?

a)

Runner A

b)

Runner B

c)

Runner C

11) Explain how you know.

Problem 5

Function AA gives the area, in square inches, of a square with side length xx inches.

Complete the table. Write the values for the labeled cells in the answer boxes below.

x0123456A(x)MNPQRST\begin{array}{|c|c|c|c|c|c|c|c|} \hline \\[-1em] x & 0 & 1 & 2 & 3 & 4 & 5 & 6 \\[-1em] \\ \hline \\[-1em] A(x) & \text{M} & \text{N} & \text{P} & \text{Q} & \text{R} & \text{S} & \text{T} \\[-1em] \\ \hline \end{array}

12) Cell M

13) Cell N

14) Cell P

15) Cell Q

16) Cell R

17) Cell S

18) Cell T

19) Represent function AA using an equation.

20) Sketch a graph of function AA.

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Problem 6

Function ff is represented by f(x)=5(x+11)f(x) = 5(x + 11).

21) Find f(2)f(-2).

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22) Find the value of xx such that f(x)=90f(x) = 90 is true.

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