Identifying Independent/Dependent Variables Math

What is the dependent variable?

The number of eggs Dairus has, e, and the number of batches of muffins he can bake, b

• the number of eggs Darius has, e

• the number of batches of muffins he can bake, b

In order to earn extra money on the weekends, Josie's string quartet performs at wedding receptions. The longer the reception, the more money they earn.
r = the length of the reception
m = the amount of money Josie's quartet earns
Which of the variables is independent?

• r

• m

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

Carey and Justin are raising money to purchase books for their school's library. The more money they raise, the more books they will be able to purchase for the library.
m = the amount of money Carey and Justin raise
b = the number of books Carey and Justin will be able to purchase
Which of the variables is dependent?

• m

• b

Sarah is participating in a walkathon to raise money for local literacy programs. The amount of money Sarah will raise depends on the distance she walks.
m = the amount of money Sarah will raise
d = the distance Sarah walks
Which of the variables is dependent?

• m

• d

In order to earn extra spending money, Dalton babysits children after school. The greater the number of hours he babysits, the more money he earns.
h = the number of hours Dalton babysits
m = the amount of money Dalton earns
Which of the variables is dependent?

• h

• m

In the United States House of Representatives, the number of Representatives from a state is calculated based on its population.
r = the number of Representatives
p = the population of a state
Which of the variables is independent?

• r

• p

Tim got 3 pieces of candy for every house he trick or treated at.

c = candy
h = house

The dependent variable is:

• c = candy

• h = house

Sophie earned $1 for every time she got an A on her report card.

m = money
A = A on report card

The dependent variable is:

• m = money

• A = A on report card

The independent variable is:

• p = prize

• b = books she reads