Find the volume of the cylinder in terms of pi with a radius of 5 in an a height of 14 in

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 .

Twelve less than a number is at most 20

What is the measure of angle 1? a.28 b.152 c.168 d.64