Identifying Functions
8th Grade · Math · 15 min
Lesson Preview
Learning Objective
I can identify functions from graphs, tables, and other representations.
- 1
In a function, each input (x-value) should produce only one output (y-value), like a vending machine that dispenses the same item each time you press the same button.
- 2
If a vertical line drawn on a graph intersects the graph at more than one point, then the graph does not represent a function.
- 3
To keep a table a function, if an x-value repeats, it must have the same y-value.
