Question

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 C B. There is no relationship between the variables. C t

Answer 1

T in the independent variable because it does not change based on the other variable. The other variable (C) changes based on it.

Answer 2

The independent variable is the $15 shop fee, as it's not affected by any other possible numbers like 10t is. It stands on its own and is only bothered when its added to the answer of 10t to give you C.