Algebra and Pre-Algebra Lessons

Algebra 1 | Pre-Algebra | Practice Tests | Algebra Readiness Test

Algebra E-Course and Homework Information

Algebra E-course Info | Log In to Algebra E-course | Homework Calculator

Formulas and Cheat Sheets

Formulas | Algebra Cheat Sheets
» » Linear Functions

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.

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

Ok, let's move on! In our first example, we are going to find the value of x when given a value for f(x). This is one of the trickier problems in the function unit. Watch carefully where we substitute the given number 4.

Let's take a look.

Example 1

evaluating functions

Pretty easy, right? This is really just a review of concepts that you've already learned. Once you figure out that you substitute 4 for f(x), you solve this as a regular two step equation.

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

This process for this problem is exactly the same as you learned when writing equations. The only difference is how you state your "function" at the end. It must be written in function notation.

Example 2

linear function example

This completes our lesson on Linear Functions. Hopefully you do not let the word "function" intimidate you. As you can see, you know how to solve all of these problems from studying equations. Now you just have to be a little fancier with how you name your equation.

In the next lesson, we will continue our study of functions by taking a look at quadratic functions.

Like This Page?


We would love to hear what you have to say about this page!

More Function Lesson You Might Like

Top of the Page

Follow Algebra-Class

Algebra Class E-course Members


Sign Up for Algebra Class E-courses

Click here to retrieve a lost password.

Search This Site

Custom Search

Having Trouble with Your Homework?


Algebra Class Courses

algebra ecourse

algebra 1 review course

pre algebra ecourse

Algebra Class
Most Popular Pages

algebra practice test

algebra cheat sheets

algebra formulas

What People Are Saying...

"I'd like to start off by relaying my sincerest gratitude for your dedication in teaching algebra. Your methodology is by far the simplest to follow, primarily because you take the time to include the small steps in between that most other teachers leave out.

It helps to know why you are doing something. I am 45 and heading to college to get my BS in Business. I need to brush up, hence the visit to your site. Great Job!"

Jimmy - United States

"I stumbled onto your site after I found out that I needed to use some fundamental algebra for an assignment. Turns out I had forgotten some things and your great site helped me remember them like "that" (snap of fingers). The organization of the site let me find exactly what I was looking for so easily. Kudos to you for maintaining such a great resource for students of all ages!"

Tom - United States

"I just wanted to write and basically thank you for making such a wonderful website! I'm 20 years old and about to take a basic placement test for college. I wanted to brush up on my Algebra skills and I stumbled upon your site. I'm amazed at how simple you make it and how fast I'm remembering Algebra! I don't remember getting most of the answers right when I had an actual teacher in front of me teaching this. Thanks a lot!"

Elizabeth - United States

"I am a pensioner living in South Africa. I stumbled on your website, the best thing that could ever happen to me! Your course in Algebra has helped me a lot to better understand the different concepts. Thank you very much for sharing your skills for teaching math to even people like me. Please do not stop, as I am sure that your teachings have helped thousands of people like me all over the world."

Noel - South Africa

This is an amazing program. In one weekend I used it to teach my Grade 9 daughter most of the introductory topics in Linear Relations. I took her up to Rate of Change and now she can do her homework by herself.

Reg - United States

Connect and Follow Algebra Class

Copyright © 2009-2015 Karin Hutchinson ALL RIGHTS RESERVED