For each situation, identify the dependent and independent variables. Write a function in function
notation, and use the function to solve the problem.
3. A plumber charges [tex]$70 per hour plus $[/tex]40 for the call. What does he charge for 4 hours of work? Use x to
represent the hours of work.
Dependent:
Independent:
total amount
variable amount
fixed amount
Function:
Solution: