Question

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Joey fixes bicycles and charges a shop fee of $15 and $10 per hour for time worked. If t is the number of hours worked and C is the total charge for completed work, then the variables are related by the equation

C = 10t + 15.



Which variable is the independent variable?

A. There is no relationship between the variables.

B. C

C. t

Answer 1

is it t?

Answer 2

You're correct, the independent variable is t. In cases like this, it's often easier to find the dependent variable because it is the one that depends on the other. Figuring out that relationship in each problem can help pin down each type of variable. In this problem, the amount of money Joey charges DEPENDS ON the amount of time he works. It's clear from that sentence that the Dependent variable is the amount of money (C) because it depends on the Independent variable, the amount of time he works (t).

Answer 3

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