Pls help me with the answer

What is the name used to describe a graph where for some value of x, there exists 2 or more different values of y?

Darian wants to build a regulation size pool table that is 9 feet in length. he plans he ordered are 18 by 36 inches. what is the scale factor of the dilation he must use to build a regulation pool table

Which steps could be part of the process in algebraically solving the system of equations, y+5x=x^2+10 and y=4x-10