Written by the Fiveable Content Team • Last updated August 2025
Verified for the 2027 exam
Verified for the 2027 exam•Written by the Fiveable Content Team • Last updated August 2025
Definition
A graphical method to determine if a function is one-to-one: if any horizontal line intersects the graph more than once, the function is not one-to-one and does not have an inverse.