Ratios and Proportions Big Ideas

What is the unit rate in this proportional relationship?

• 60 miles/1 hour

• 120 miles/ 2 hours

• 1 mile/ 1 hour

In the equation y = 14x, what is the constant of proportionality?

• y

• x

• 14

Which of these describes the unit rate?

• a unit of measure

• a fraction with a numerator of one

• a fraction with a denominator of one

• a proportion

Josh bought a pizza with eight slices of pizza for $12. What is the cost of a slice of pizza?

• $12

• $1.50

• $3

• $1

What is the constant of proportionality?

• $3

• $4

• $2

• $9

• 4

• 6

• 8

• 10

If the ratio of boys to girls in a class is 3:4, how many boys are there if there are 20 girls?

• 15

• 25

• 10

• 30

If the ratio of cats to dogs in a pet store is 3:4, how many cats are there if there are 20 dogs?

• 15

• 25

• 30

• 10

A scale drawing of a park has a scale of 1 inch : 100 feet. If the actual length of the park is 300 feet, how long is it on the drawing?

• 2 inches

• 3 inches

• 4 inches

• 5 inches

What is the ratio of 30 minutes to 2 hours in simplest form?