Which expressions give the monthly pay of an employee with 20 hours of training? a. 20 (pay) or 20 (p) b. 20 x pay or 20 x p c. pay (20) or p (20) d. hours (20) or h (20)

If the name of the function is pay, wtih nickname p, and the variable is the numbers of hours of training, then the expression for 20 hours of payment is pay (20) or p (20).

In this case pay or p is the dependent variable and hours is the independent variable.