Ratios and Proportional Relationships

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

• y

• x

• 14

• y=14

You spend $40 on 5 pounds of concrete. What is the unit rate in dollars per pound?

• $8 per pound

• $5 per pound

• $35 per pound

• 0.125 pounds per dollar

What is the constant of proportionality for the table above?

• X 2

• X 1/2

• X 3

• None of the above

Is this table proportional or non-proportional?

• Proportional

• Non-Proportional

At Nan's Bakery, they use one container of frosting for every 36 cupcakes. Today, Nan needs to put frosting on 300 cupcakes. Which is closest to the number of containers of frosting Nan will need?

• 12

• 9

• 7

• 4

In the 7th grade, there are 3 boys for every 5 girls. If there are 70 girls in the 7th grade, how many boys are there?

• 42 boys

• 30 boys

• 80 boys

• 28 boys

Select all graphs that represent a proportional relationship.

• 
• 

A parking lot has 3 cars and 12 trucks. Find the ratio of cars to trucks. Select all the true ratios.

• 3 trucks : 12 cars.

• 3 cars to 12 trucks

• 3 cars to 12 trucks

Is this table Proportional?

• Yes, because the COP is different each time.

• Yes, because the COP is always X9.

• No, because the numbers are all different.

• No, because the COP changes each time.

Which statement best describes the relationship between x and y in the table?

• Proportional

• Not Proportional