PLEASE HELP ME IT'S DUE TODAY IF CORRECT I'LL MAKE BRAINYLIST

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

What is the value of x in the following equation? -3x-2=2x+8

1. 2. ∠b and ∠y are right angles. 3.? 4.? which two statements are missing in steps 3 and 4? ∠x ≅ ∠c △abc ~ △zyx by the sas similarity theorem. ∠b ≅ ∠y △abc ~ △zyx by the sas similarity theorem. = 2 △abc ~ △zyx by the sss similarity theorem. = 2 △abc ~ △zyx by the sss similarity theorem.