Locate the element : 1) Zn 2) Cl

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

Me with this one question, and i'll upvote the brainliest answer

Use the four functions below for this question. compare and contrast these four functions using complete sentences focus on the slope and y- intercept first, and then on any additional properties of each function