I'ma be posting alot of these cuz if I get 1 wrong, i fail:(

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 table above shows approximate conversions from gallons to liters. what is the value of x?

The hawaiian alphabet has 12 letters. how many permutations are posible for each number of letters?