To find the reflection \( g(x) \) of the function \( f(x) = \frac{1}{-x^2 + x} \) over the y-axis, we need to replace \( x \) with \( -x \) in the original function.
Starting from the function:
\[ f(x) = \frac{1}{-x^2 + x} \]
We replace \( x \) with \( -x \):
\[ g(x) = f(-x) = \frac{1}{-(-x)^2 + (-x)} \]
Now, simplify the expression:
\[ g(x) = \frac{1}{-x^2 - x} \]
So, we can fill in the blanks to get:
\[ g(x) = \frac{1}{-x^2 - x} \]
Thus, the completed function is:
\[ g(x) = \frac{1}{-x^2 - x} \]