Proportional Relationships and Equations from Graphs

The graph shows the amount of money that Janice saves each week from her summer job. Which best represents the unit rate?

• (0 , 0)

• (1, 200)

• (200, 1)

• (2, 200)

Which equations below represent a proportional relationship? Select all that apply.

• c = 8.95t + 3

• c = 8.95t

Which of the following represents the constant of proportionality in the table?

• k = 85

• k = 95

• k = 190

• k = 125

The table below shows the relationship between the number of miles traveled, x, and the number of gallons of gas used, y. Which of the following equations best represents the relationship?

• 35 = 1x

• y = 35x

• y = 3.5x

Graph a proportional line

with a constant of 4

Given the graph of a line that passes through the origin and the point (4, 8), which of the following is true about the relationship between x and y?

• The relationship is not proportional.

• The relationship is proportional, and the constant of proportionality is 0.5.

• The relationship is proportional, and the constant of proportionality is 2.

• The relationship is proportional, but the constant of proportionality cannot be determined.

Graph a proportional line

with a constant of 2/4

A graph shows a straight line that passes through the points (0,0) and (5,15). What is the equation of the line that represents this proportional relationship?

Which of the following graphs does not represent a proportional relationship?

• 
• 
• 
• 

Is there a proportional relationship between x and y?

• YES

• NO