Exploring the Constant of Proportionality

What is the formula for finding the constant rate of change?

• k = x * y

• k = y / x

• k = y - x

• k = x / y

If a plane travels 290 miles in 30 minutes, what is the constant rate of change in miles per minute?

• 10

• 9

• 8

• 9 and 2/3

How many students per bus if there are 144 students and 2 buses?

• 74

• 72

• 70

• 68

What is the constant rate of change if y = 24 and x = 4?

• 7

• 6

• 5

• 8

Which family averaged fewer miles per hour if Guzman family traveled at 45 mph and Hashimoto family at 60 mph?

• Both traveled the same

• Hashimoto

• Cannot be determined

• Guzman

If 2 pancakes have 16 chocolate chips, how many chocolate chips are in 9 pancakes?

• 72

• 80

• 64

• 88

How many pancakes have 48 chocolate chips if the constant rate of change is 8?

• 4

• 6

• 7

• 5

What is the unit rate of chocolate chips per pancake if 1 pancake has 8 chocolate chips?

• 9

• 8

• 7

• 6

What is the constant rate of change if y = 18 and x = 4?

• 4.5

• 5

• 4.25

• 4

How many cups of orange juice are needed for 12 cups of apple juice if the constant rate is 1.5?

• 16

• 22

• 18

• 20