Trey wants to plant grass in his backyard. his backyard is in the shape of a rectangle. its length is 31 feet and its width is 24 feet. suppose each pack of seed covers 12 square feet. how many packs of seed will he need to cover the backyard?

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.