PLEASE EXPLAIN (Arithmetic Sequences ) If u59 = 1/10 and u100 = 1 19/20 for an arithmetic sequence, find the first term and the common difference

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.