In a game of Twister, 50.24 cm2 of yellow paint is needed for one of the circles. What is the length of the diameter of the circle?

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 .

The parabola opens: y=√x-4 (principal square root) up down right left

Write the equation in logarithmic form e^x=403.429