Using the Vertical Line Test

Use the vertical line test to determine if a graph is a function or not a function.

[@eljin5080]

Why is the circle not included?

[@whou9837]

It must be 1 hit only. But it hit 2 times thats why it's not a function. Vertical line is a straight line from top to buttom.
That's why it's called vertical line test

[@rose-km8hi]

@ch you keep on drawing lines until you find a point where your vertical line hits two points or you realize only one output is being released in the graph

[@westnotbest1205]

thank you very much this is very helpful! 🤍

[@MuhammadUmar12]

i bet none of yourlines are vertical XD