Variable Practice

Grace is bringing treats to her Algebra 1 class on her birthday. The number of treats she brings is based on the number of students in her class.

Which of the variables is independent?

• number of students

• number of treats

On a graph, which axis shows the dependent variable?

• x-axis
• y-axis
• neither
• it changes

On a graph, which axis shows the independent variable?

• x-axis
• y-axis
• neither
• it changes

Asher is planning an experiment to find out how the height from which he drops a ball affects how high the ball bounces. The dependent variable is the _____.

• Diameter of the ball

• Force acting on the ball

• Height that the ball bounces

• Height from which the ball is dropped

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

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

• dependent
• independent

Identify the dependent variable:
A study was done to find if different tire treads affect the braking distance of a car.

• The car
• The distance the car took to brake 
• The different tire treads
• The drive

Identify the independent variable:
The height of bean plants depends on the amount of water they receive. 

• The bean seed
• The amount of water provided daily
• The amount of sunlight they're exposed to daily
• How tall they grow by the end of the experiment

Research question: does the distance a person kicks a soccer ball effect how well they will do on their math test.  What is the dependent variable?

• How far they kick the soccer ball
• who the person is
• how well they do on the math test
• Type of soccer ball.

When experimenting with the growth of a plant, a scientist uses three (of the same type of) plants, two different fertilizers, equal light, and equal water. What type of variable is the fertilizer?

• Dependent
• Independent
• Control
• Compound