5th grade math write the number in two other forms 0.253

Which graph represents the following piecewise defined function?

Look at the following graph of the given equation. determine whether the equation is a function. explain why or why not.

This is my question~~ ( r ^ 4 - 2r ^ 3 - 23 r ^ 2 - 4r - 32)÷(r+4) ~~ i must use long division to solve it : / i was wondering if anyone world like to solve it. and if so, share step-by-step explanations! you! ❤