Which equation supports the given conjecture?   the difference of two odd numbers is an even number.   a. 23 – 19 = 4   b. 16 – 10 = 6   c. 17 – 12 = 5   d. 3 + 5 = 8

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.