1. if 31 – 7 = 51, then 61 =
a. 21
b. -7
c. -21
d. 42

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.