Representing Proportional Relationships with Equations

What is the missing value for x?

• 21

• 27

• 30

• 45

The table shows a relationship of green candy to red candy.  If there are 4 pieces of green candy, how many pieces of red candy should there be?

• 12

• 14

• 18

• 21

Identify the constant of proportionality.

• k = 2x

• k = 2

• k = 4

• none

What does k represent in the equation

y = kx?

• distribute

• kangaroos

• constant of proportionality

• karate

Identify the constant of proportionality

• k = 5

• k = 1

• k =1/5

• k = 2.5

Identify the constant of proportionality

• k = 1/90

• k = 1/30

• k = 90

• k = 30

Is this table proportional?

• yes

• no

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

• A

• B

• C

• D