Dependent and Independent Variables

A ​ ​ ​ (a)   variable changes in response to another variable.

• dependent

• independent

What is the independent variable in the statement? The number of pages read, p, and the time spent reading, t

• Independent variable: p

• Independent variable: t

What is the dependent variable in the statement?

• Dependent variable: p

• Dependent variable: c

What is the dependent variable in the statement? The number of minutes spent talking on the phone, m, and the amount of a cell phone bill, a

• Dependent variable: m

• Dependent variable: a

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

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

• 2x

• x

• -4

• y

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

Which is the dependent variable?

• x

• y

• -1/2

• 4

Which is the dependent variable?

• x

• y

• -1/2

• 4

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

• y

• x

• -2

• 3x