Identify Independent and Dependent Variable

A(n) _____________ variable depends on or is changed by another variable.

• dependent

• independent

Ms. Shi is making a scrapbook. As she adds more photos, the scrapbook grows thicker.

p = the number of photos added

t = the thickness of the scrapbook

• t is the independent variable and p is the dependent variable

• p is the independent variable and t is the dependent variable

Sarah is bringing treats to her elementary school class on her birthday. The number of treats she brings in is based on the number of students in her class.

t = the number of treats

s = the number of students

Which of the variables is INDEPENDENT?

• s

• t

The independent variable is:

• s = stickers earned

• p = papers completed

What is the independent variable on the graph?

¿Cuál es la variable independiente en el gráfico?

• Time (minutes)

• Number of Sit-ups

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

• 2x

• x

• -4

• y

Which is the dependent variable?

• x

• y

• -1/2

• 4

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

What is the dependent variable on the graph?

• Number of Hours (h)

• Cost (c)

Which is the dependent variable?

• x

• y

• -1/2

• 4