Which point is located at (-36,-45)

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 .

Use the distributive law to multiply. 3(4x + 5y + 6)

1.two more than the quotient of a number and 6 is equal to 7 use the c for the unknown number translate the sentence into an equation