Which statement best describes the function below?
f(x)=x2-x2-9x+9

Answer:
B. It is a many-to-one function.
Step-by-step explanation:
To find what the function below is, you can use the Function Grapher and Calculator from Math is Fun to graph the function.
As you can see, the graph passes the vertical line test, since each x-value has exactly one y-value.
According to the diagram below, the function will be a many-to-one function, since there are y-values that have three different x-values.
So, your answer will be B. it is a many-to-one function.
Hope this helps!