Proportional or Not from a Table

What is the constant of proportionality?

• $3

• $4

• $2

• $9

Select all the tables that show a proportional relationship between x and y in the ratio table. There are TWO ANSWERS!

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Answer explanation

Proportional tables show a consistent constant that each x can be multiplied by to get the corresponding y in the ratio table.

Divide each ratio $\frac{y}{x}$ to see if there is an consistent constant that takes each x to each y in the ratio table.

This is a table with a proportional relationship between A and B.  Find the missing value of B. 

• 33

• 44

• 32

• 48

The number of trees and the number of apples are given in the table above. Determine which statement below is correct.

• The table is not proportional because the unit rate is not constant.

• The table is proportional and the unit rate is 1/13

• The table is proportional and the unit rate is 13.

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

• 45

• 90

• 135

• 2

Which of the following is an equation to represent this proportional relationship?

• y=15x

• x=15y

• y=3x

• x=3y

Use yoga classes as your x and cost as your y. Which equation represents this table?

• y=30x

• y=2x

• y=15x

• y=6x

Which of the following equations represent this table?

• y= 2x

• y=1/2x

• y=5x

Which of the following is an equation for this relationship?

• y=90x

• y=25x

• y=45x

• y=2x

What is the scale factor from triangle ABC to triangle DEF?

• 1/2

• 7/3

• 2

• 10/3