Question: Determine whether the graph of the function has an inverse.
A ) No B ) Yes
Steps to derive
1 If every horizontal line intersects the graph in at most one place, then the graph of the function represents a one-to-one function.
[Horizontal line test.]
2 The horizontal line drawn passes through the graph of the function only once.
3 So, the graph of the function is one-to-one, which implies the graph has an inverse.
