Identifying Dependent and Independent Variables

Paco's daughter will be participating in an upcoming dance recital. She will require a different costume for each dance she plans to performs.
c = the number of costumes Paco's daughter will require
d = the number of dances Paco's daughter plans to perform
Which of the variables is independent?

• c = the number of costumes
• d = the number of dances

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 = the number of students
• t = the number of treats

Tiffany was investing how fast it took Hayden to react to different sounds. Identify the independent variable.

• How fast Hayden reacted
• different sounds
• types of music
• Hayden

How does watching TV during studying affect a student’s test grades?

• independent
• dependent

Do roses grow more in height in partial or direct sunlight?

• independent
• dependent

Dilcia wants to know how drinking milk affects how tall Monica grows. Which is the independent variable?

• Monica's growth

• drinking milk

Identify the independent variable:

The amount of money, m, earned if t raffle tickets are sold

• money, m

• tickets, t

Identify the independent variable

The number of hours, h, worked and the amount of money, m, earned

• hours, h

• money, m

Identify the independent variable

The number of shelves, s, in a bookcase and the number of books, b, the bookcase can hold

• s

• b

Identify the independent variable

The number of pages, p, you read in your book in h hours

• p

• h