Amy bakes x cakes. Barry bakes four times as many cakes as Amy.
Ceri bakes 12 more cakes than Amy.

They bake a total of T cakes.

Find a formula, in terms of x, for the total number of cakes.
Give your formula in its simplest form​

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.