7th Grade Math

Test PracticeT

C 10. OPEN ENDED Make a table where the constant rate of change is 6 inches

for every foot.

11. E WRITE MATH Write a problem to represent a constant rate of change
    of $15 per item.


12. Use the information in the table to find
    the constant rate of change.

Number

of Apples^3710

Number

of Seeds^3070110

A. ^101 B. 101 C. ^404 D. 404

13. GRIDDED RESPONSE Reggie started
    a running program to prepare for track
    season. Every day for 60 days he ran
    a half hour in the morning and a half
    hour in the evening. He averaged
    6.5 miles per hour. At this rate, what is
    the total number of miles Reggie ran
    over the 60-day period?

Lesson 2B Slope 395

Rates of Change

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Recall that linear functions have graphs that are straight lines. Nonlinear functions

have graphs that are not straight lines.

GARDEN Determine whether the table represents a linear or Garden

Length (ft)

Garden

Area (sq ft)

1 1

2 4

3 9

416

nonlinear function. Explain.

Graph the points on a coordinate plane.

Area (sq ft)

Length of Side (ft)

O 11 234 5

20

18

16

14

12

10

8

6

4

2

Garden Length and Area The change in area from

a side length of 1 foot to

2 feet and from 2 feet to

3 feet is not constant.

Therefore, the graph is

not a straight line. So,

the table represents a

nonlinear function.

Determine whether the table represents a linear or nonlinear function. Explain.

14. 
    

    (^) x 1234
    y 1 8 27 64

    
    


15. 
    

    x 1234
    y 0259

    
    

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