Identifying Functions

Free to teach as-is. Adapt it for your group in about two minutes.

Adapt this lesson for your group

Objective

I can determine if a relation is a function using the vertical line test.

Part 1 of 3

Warm-up video

mathantics · 11:34Vetted channel

We don't generate video — this one is by mathantics 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 3

Practice

12 questions

1

Explain in your own words what a function is. Use the terms 'input' and 'output' in your explanation.

2

Consider the relation represented by the set of points: {(1, 2), (2, 4), (3, 6), (1, 5)}. Is this relation a function? Explain why or why not.

Part 3 of 3

Exit ticket

Quick comprehension check

Determine if the equation y = x - 5 is a function. Explain your reasoning.

Sample answer included in the free materials

Get the materials

Teacher guide, student handout, and slides — free, in Google Docs format

  • Teacher Guide

    Complete lesson plan with answer keys and alternate activities

  • Student Handout

    Printable worksheet

  • Slides

    Ready to present

Teaching a group at a different level?

Where are your students right now? We'll rebuild this lesson to match — including the teacher guide, student handout, and slides, saved to your Google Drive.

Adapt This Lesson