Independent and Dependent Variables on Graphs and Tables

• A

• B

• C

• D

Which is the dependent variable?

• x

• y

• -1/2

• 4

What is the independent variable on the graph?

• Number of Hours (h)

• Cost (c)

What is the dependent variable in the equation y = 3x - 2?

• y

• x

• -2

• 3x

Which table represents the graph?

• 
• 
• 
• 

What are the dependent quantities from the table?

• y=x

• y= -3x

• y=3x

• y=3x+9

In the equation y = 2x - 4, what is the dependent variable?

• 2x

• x

• -4

• y

Which statement is true about the set of numbers and its relationship to the graph?

• {1,2,3,4} represent the set of dependent quantities shown in the graph.

• {2,4,6,8} represent the set of independent quantities shown in the graph.

• {1,2,3,4,6,8} represent the set of independent quantities shown in the graph.

• {2,4,6,8} represent the set of dependent quantities shown in the graph.

A phone company charges a base rate of $40 a month for service. The user is charged $0.20 a minute for every minute used. The total amount charge to the customer, p, for any number of minutes, m, can be represented by the function
p = .2m + 40.
What is the dependent variable?

• The # of minutes used

• The base rate of $40

• The total amount charged to the customer

• The $0.20 per minute

Elizabeth hired a cleaning service to clean her house. To find C, the total cost of cleaning her house, she used the following equation.

C = 7.5x + 25

What is the dependent variable for the equation?

• 7.25

• 25

• C

• x