Y=4x+1
do x and y vary directly?

For the function, f(x) = -5x 2, find f(-4).

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 .

Find the solution set of this inequality. select the correct graph. |8x+16|> 16