Graphing Proportional Relationships Quiz

Which of the following represents the equation of a line for a proportional relationship?

• y = kx

• y = k/x

• y = k + x

What does the slope of a graph of a proportional relationship represent?

• The slope represents the maximum value of the graph.

• The slope represents the rate of change or the constant of proportionality.

• The slope represents the average of the x-values.

• The slope represents the y-intercept of the graph.

Which of the following is a method to determine if a relationship is proportional based on a graph?

• Check if the graph is a straight line passing through the origin (0,0)

• Check if the graph is a straight line passing through a point other than the origin

• Count the number of points on the graph

• Check if the graph is a curve

The number of trees and the number of apples are given in the table above.  Determine which statement below is correct.

• The table is not proportional because the unit rate is not constant.
• The table is proportional and the unit rate is 1/13
• The table is proportional and the unit rate is 13.
• The table is not proportional because it doesn't pass through the origin.

Using the graph above, determine the constant of proportionality.

• k = 0
• k = 1
• k = 3
• k = 6

Determine which equation does NOT represent a proportional relationship.

• y = -2x
• y = 1/2 x
• y = 3x
• y = 5x - 7

The cost, c, of potato salad by its weight in pounds, p, at a deli is given in the table above.  Which equation best models this data.

• c = .29p
• c = 3.5p
• p = .29c
• p = 3.5c

What is the constant of proportionality based on the table above?

• 1/75
• 75
• 1
• 0

Jacob mixed 8 cups of flour with 2 cups of water to make pizza dough.  To represent the relationship between the number of cups of flour, f, and the number of cups of water, w, needed to make the same pizza dough, Jake wrote the equation
f = ____ w
What should be placed in the blank?

• 1/4
• 8
• 2
• 4

The time in minutes it takes a sloth to move a certain distance in feet is shown in the graph above.  How far can a sloth move in 5 minutes?

• 1 foot
• 10 feet
• 20 feet
• 30 feet