A recipe call for 2 eggs for every 3 cups of sugar used. A total of 9 cups of sugar are used. How many eggs do I need?

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 .

Solutions for 2x+7 less than or equal to 3x-5

Ofin . (2,4) (2,1) a. y= 2 b. x= 2 c. x= -2 d. y= 2x