Does the equation below represent a relation, a function, both a relation and a function, or neither a relation nor a function?

neither a relation nor a function

Y=x^2-9x

it is a function and relation

It's only a function

Step-by-step explanation:

Why it's only a function is that it contains the notation of a function which is F (x) = Y and the F (x) stands for the inputs vaules or values of X which also called the Domains while when it's Y=X^2-9X stands for the output values or values of Y which is also called the Range. And within the above question you can also find the inverse of a function.