# Relations and Functions

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More Lessons for Algebra 1
Math Worksheets

Examples, solutions, videos, worksheets, games and activities to help Algebra 1 students learn how to distinguish between relations and functions.

What is a function?
Functions and their graphs
Domain and range of a function
Example:
Find the domain and the range.
1. Justin charges \$10 per hour for mowing lawns.
2. Maria charges \$25 per hour for tutoring math with, with a minimum charge of \$15.
3. f(x) = 15x - 12.
4. f(x) = 2x2 + 5
5. f(x) = 1/x
6. What is the range of the function y = x2 - 5 when the domain is -2, -1, 0, 1, 2? Evaluate Functions
Learn how do we evaluate functions for given input values
Example:
Evaluate the following function for the value x = 1/3.
f(x) = -4x2 - 7x + 9
How to Determine if a Relations is a Functions?
How to determine is a relation is a function and the concepts behind mapping a relation and the vertical line test.

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