Question

The function f(x)=125+50x represents the amount of money a mechanic charges in dollars for x hours of labor and $125 for parts

Interpret what the value 50 means in the equation.
How many hours did it take if the bill is $325?

Answer 1

50 is the hourly rate, if the bill is $325 then the hours would be 4 hours.

Explanation:

If x increases by 1, the total increases by $50. This means that for every x hour increase, the bill will increase $50.

To solve for x, you need to plug numbers in.

325 = 125 + 50x

200 = 50x

x = 4

Hope this helps!