# Vertical Line Test

- Author:
- A B Cron

- Topic:
- Algebra, Equations, Functions, Function Graph

Follow instructions on screen.
For all functions, write the equation.
For all non-functions, write the relation and the number of intersection points with the vertical line.

There are three relations where there are no points of intersection shown by the program, but the vertical line crosses them twice.
Several functions are discontinuous functions, one of which appears to be a linear equation.