You bought a car for $20,000. you have owned it for one year, and it is now worth $16,000. what is the percent decrease in your car's value?

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.