Proportional Relationship

What qualities must a graph have in order for it to be proportional? (Select ALL that apply)

• Must cross through the Origin, point (0,0)

• Must always be positive

• Must be a line

• Must be a straight line; has to be linear

What is the unit rate in this proportional relationship?

• 60 miles/1 hour

• 120 miles/ 2 hours

• 1 mile/ 1 hour

Which graph is proportional?

• A

• B

• C and D

• All of the graphs are proportional

Write an equation for this relationship.

• y=1/5x

• y=1/2x

• y=2x

• y=5x

What is the constant of proportionality (in miles per hour) based on the table?

• 45

• 90

• 135

• 2

• 8

• 12

• 16

• 20

What is the constant of proportionality?

• $3

• $4

• $2

• $9

A recipe calls for 3 cups of flour for every 4 cups of sugar. If you want to make a half batch, how many cups of sugar do you need?

• 2 cups

• 3 cups

• 4 cups

• 6 cups

A survey in a school found that 60 students own a bicycle. If this represents 30% of all students, how many students are in the school?

• 180

• 200

• 220

• 240

A recipe calls for 3 cups of flour for every 4 cups of sugar. If you want to use 6 cups of sugar, how many cups of flour do you need?

• 4.5

• 5

• 4

• 4.5