That is a tenth degree equation.
The degree of an equation is the highest power it contains.
<h2>Explanation:</h2><h2 />
- The input of a function is also called the domain and are those x-values for which the function is defined.
- The output of a function is also called the range and are those y-values for which the function is defined.
Here we have the following function:

And we know that:
Input:

Output:

I'm not 100% sure, but I believe the answer is A. x²-5/4x+1