Solving a Linear Function - Part 2


In the previous lesson on functions you learned how to find the slope and write an equation when given a function. Click here to review the first lesson on Linear Functions before moving on!

Linear functions are very much like linear equations, the only difference is you are using function notation (fx) instead of y. Otherwise, the process is the same.

If you need a refresher on writing equations, you may want to review writing equations given slope and a point before completing this lesson. You may also need a refresher on solving equations to complete problem number 1.



Ok, let's move on! In our first example, we are going to find the value of x when given a function. Let's take a look.


Example 1

linear function



Pretty easy, right? This is really just a review of concepts that you've already learned!


In example 2, you will see how to write the equation of a function given slope and a point.


Example 2

linear function example



This completes our lesson on Linear Functions! Are you ready for a couple of practice problems?




linear functions practice problems

Practice Problems

linear function example


Let's check your answers!






Answer Key


Problem 1

linear function solution



Problem 2

linear function answer




Great Job! You are ready to move onto the next lesson, quadratic functions.



Functions Unit


  • Introduction to Algebraic Relations

  • Identifying Functions & Using the Vertical Line Test

  • Function Notation

  • Evaluating Functions

  • Functions (Linear) - Part 1

  • Functions (Linear) - Part 2   You Are Here!

  • Quadratic Functions - Part 1   Your Next Lesson!

  • Quadratic Functions - Part 2 - Using the Vertex Formula

  • Step and Discontinuous Functions


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