Identify Functions
A relation is a function when each input has exactly one output.
Do this: Read the concept below, then try the quiz or activity.
Lesson 110 of 188
58%
Concept
Function test: - no x-value can map to two different y-values.
Examples: - {(1,3),(2,5),(3,7)} is a function. - {(2,4),(2,9)} is NOT a function (x=2 has two outputs).
Graph test: - vertical line test: if any vertical line hits graph twice, it is not a function.
Try it
Practice: Identify Functions.