Last week, it rained inches. This week, the amount of rain decreased by 5%. Which expressions represent the amount of rain that fell this week? Select all that apply.

Decide whether or not each equation represents a proportional relationship.

1. Volume measured in cups () vs. the same volume measured in ounces ():

2. Area of a square () vs. the side length of the square ():

3. Perimeter of an equilateral triangle () vs. the side length of the triangle ():

4. Length () vs. width () for a rectangle whose area is 60 square units:

Add.

In each diagram, represents a different value. For each diagram,

1. What is something that is definitely true about the value of ?

2. What is something that could be true about the value of ?

A number line labeled A with four tick marks. Number line A. Beginning at first tick mark, labeled negative 1, x, 0, 1. 

A number line labeled B with four tick marks. Number line B. Beginning at first tick mark, labeled negative 1, 0, 1, x. 

A number line labeled C with four tick marks. Number line C. Beginning at first tick mark, labeled negative x, negative 1, 0, 1. 

A number line labeled D with four tick marks. Number line D. Beginning at first tick mark, labeled negative 1, 0, negative x, 1.