Suppose 7 quarts of milk cost $5.25. Use the unit price (price per quart) to determine how much 2 gallons of milk cost?

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.