Math 7, Chapter 5 Review (Pg. 205-207)

1

Solve the proportion: (s + 1)/4 = 4/8

6.25

Solve the proportion: 5/12 = y/15

15

Solve the proportion: 8/20 = 6/w

1.6

Solve the proportion: x/4 = 2/5

28.9/1

What is the unit rate for 289 miles on 10 gallons?

120/1

What is the unit rate for 480 calories in 4 servings?

2.4/1

What is the unit rate for 6 2/5 revolutions in 2 2/3 seconds?

4/3

Write the ratio in simplest form: 16 dogs to 12 cats

5/9

Write the ratio in simplest form: 25 to 45

7/3

Write the ratio in simplest form: 35 girls: 15 boys

Yes

Do the following pairs show a proportional relationship: (1, 4), (3, 12), (6, 24), (8, 32)?

Yes

Do the ratios form a proportion: 12/22, 18/33?

Yes

Do the ratios form a proportion: 32/40, 12/15?

No

Do the ratios form a proportion: 4/9, 2/3?

No

Do the ratios form a proportion: 8/50, 4/10?

No

Does x and y show direct variation: x + y = 6

Yes

Does x and y show direct variation: x/y = 20

Yes

Does x and y show direct variation: y - x = 0

No

Does x and y show direct variation:x = y + 2

2

Find the slope between (-2, -3) and (1, 3)

2/3

Find the slope between (-3, -2) and (3, 2)

5/4

Find the slope between (-3, -3) and (1, 2)