Tony is at a car rental service to rent a car. There is an administration fee of $50 to rent a car and then it costs $20 for each day he has the car. Write an expression for the total
cost of renting a car at this particular car rental service.

The input to the function is x and the output is y. write the function such that x can be a vector (use element-by-element operations). a) use the function to calculate y(-1.5) and y(5). b) use the function to make a plot of the function y(x) for -2 ≤ x ≤ 6.