7th Grade Math

424 Linear Functions

Test Practice

Read each question. Then fill in the correct

answer on the answer document provided by

your teacher or on a sheet of paper.

1. Lisa’s monthly charge for phone calls c can
   be found using the following equation.
   c = 15 + 1.5h
   In the equation, h represents the number of
   hours of usage during a month. What is
   the total charge for a month in which Lisa
   made 10 hours of phone calls?
   A. $25.00
   B. $27.50
   C. $30.00
   D. $32.00


2. The graph of the line y = 2 x + 2 is shown
   below. Which table of ordered pairs
   contains only points on this line?
   y

x

1

1234

2

3

4

• 4 - 3 - 2 - 1
  
  
  • 2
  
  
  • 3
  
  
  • 4
  
  
  
  

0

F.

x -21 2

y 246

G.

x -21 2

y -24 6

H.

x -21 2

y - 2 - 4 - 6

I.

x -21 2

y - 2 - 46

3. Which statement is true about the slope of
   line LN?
   y

x

/

.

2

2468

4

6

8

• 8 - 6 - 4 - 2
  
  
  • 4
  
  
  • 6
  
  
  • 8
  
  
  
  

0

A. The slope is negative.

B. The slope between point L and point M

is greater than the slope between

point M and point N.

C. The slope is the same between any

two points.

D. The slope between point N and M is

greater than the slope between point M

and L.

4. GRIDDED RESPONSE John is training
   for a marathon and has 50 days to train.
   He plans to run for 3 hours a day at an
   average speed of 4.5 miles per hour. What
   is the total number of miles he will run
   over the next 50 days?


5. GRIDDED RESPONSE Elia is in an
   airplane on her way to the Caribbean. She
   is currently at 7,000 feet. She looks down
   150 feet and sees a cloud. How high in feet
   is the cloud above the ground?


6. SHORT RESPONSE A dinner is served at
   an athletic booster fundraiser. The constant
   relationship between the number of people
   served at dinner n and the number of
   ounces of beef used b is shown in the table
   below. How many people were served if
   760 ounces of beef were used?

n 5 20 150?

b 20 80 600 760

423_425_C07_STP_895130.indd 424 12/31/09 4:35 PM