Question

The inverse of a function is a function. always /sometimes /never

Answer 1

The answer is sometimes

Answer 2

Hmmm,
a function can be determined by the vertical line test
if you can draw a vertical line that passes through the graph twice, it is not a function

the inverse is the graph reflected across the line y=x
we can determine the answer to this question graphically

take y=x^2 for example
this is a function
reflected across the line y=x, and it is not a function
it fails the vertical line test

but, we can also take y=3x and reflect it and it is still a function

so the answer is sometimes