What’s the answer to this problem

Twenty-five percent of the customers entering a grocery store between 5 p.m. and 7 p.m. use an express checkout. consider five randomly selected customers, and let x denote the number among the five who use the express checkout.

Find the slope of a line given the following two points

What is the 17th term in the arithmetic sequence in which a6 is 101 and a9 is 83