Review for Unit 2 Test

Select ALL of the equations that represent a proportional relationship.

• y = 2x + 1

• c = 3.14d

• p = 4s

• $C\ =\ \frac{9}{5}f\ +\ 32$

• $y\ =\ \frac{1}{3}x$

Describe this graph.

• Proportional

• Non-proportional

Describe this graph.

• Proportional

• Non-Proportional

Describe this graph.

• Proportional

• Non-proportional

Describe this graph.

• Proportional

• Non-proportional

What makes a graph proportional?

• Linear

• The curvy line goes through the origin

• Curvy line

• The straight line goes through the origin

Here is a graph of water used, w, in gallons and time in the shower, t, in minutes.

What is the constant of proportionality for the proportional relationship?

Here is a graph of water used, w, in gallons and time in the shower, t, in minutes.

What is the equation for the proportional relationship?

• w = 2t

• t = 2w

• t = 20w

• w = 20t

What is the equation for the graph?

• y=5x

• y=6x

• y=30x

• y=jfoiwuyr98q27r98

What is the equation for the graph?

• y=9/3x

• y=6x

• y=9x

• y=3x