Proportionality in Tables and Equations

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

• 45 mph

• 90 mph

• 135 mph

• 2 mph

Write an equation to represent the proportional relationship in the table.

• y = -3/2x

• y = 3/2x

• y = -2/3x

• y = 2/3x

Write an equation to represent the proportional relationship in the table.

• y = 2x

• y = -2x

• y = 1/2x

• y = -1/2x

Which graph shows a proportional relationship between x and y?

• F

• H

• G

• J

Which graph is NOT proportional?

• A

• C

• B

• D

What is the unit rate of this graph? Be sure to include the units!

• $24 per book

• 12 books per dollar

• $2 per book

• $12 per book

Write an equation to represent the proportional relationship in the graph.

• y=20x

• y=2x

• x=2y

• y= -20x

Kelly gets paid $15 per hour. Write an equation to represent her wages (x is time and y is money).

• y = 15x

• y = 0.15x

• x = 15y

• none of the above

Is this graph proportional? Why or why not.

• Yes, because it is a straight line.

• Yes, because it is linear and goes through the origin.

• No, because it isn't a straight line.

• No, because it doesn't go through (0,0).

Is this table proportional?

• Yes

• No