Identifying Functions
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Objective
I can identify functions from graphs, tables, and other representations.
Part 1 of 4
Warm-up video
Get Sum Math · 6:08
We don't generate video — this one is by Get Sum Math on YouTube. The practice questions and exit ticket below were drafted by AI for this objective, and every question is editable in the teacher guide.
Part 2 of 4
Key concepts
3 concepts
- 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.
Part 3 of 4
Practice
3 questions
Which of the following tables represents a function?
Explain how the vertical line test can be used to determine if a graph represents a function.
Part 4 of 4
Exit ticket
Quick comprehension check
“Which of the following tables represents a function? Explain why. A) {(-1, 2), (0, 5), (1, 2), (2, 8)} B) {(3, 4), (3, 5), (6, 7), (8, 9)} C) {(1, 5), (2, 6), (3, 7), (1, 8)}”
Sample answer included in the free materials
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