If g(x) = 3x-2, find g(8) -g(-5)

Iam trying to solve a linear equation for the shoe size of someone 84" tall taking into consideration example 1 is 69" tall with a shoe size of 9 and example 2 is 72 inches tall with a shoe size of 11. i understand that the equation should be y=mx+b and that on the graph the answer is (3,2) but i just don't understand how to create the equation to solve for 84-inches and 60-inches tall questions. after two days, i need .

Create a data set with 8 points in it that has a mean of approximately 10 and a standard deviation of approximately 1.

Which is the solution to the inequality? 2 3/52 1/15 b< 3 2/15 b> 3 2/15