Graphing Linear Functions

Math Is Fun is a website that offers a myriad of resources to learn math in an enjoyable manner.

In this section you can explore the effect of changing the slope and/or the y-intercept on the graph of a straight line.

Explore the properties of a straight line graph
Source: Math Is Fun

Finding the equation of a straight line from 2 points is also possible here -although you will have to scroll down a bit further. Just move the dots on the graph and see how the line equation changes in real time.

Find the equation of a straight line from 2 points
Source: Math Is Fun

My suggestion is for you to only use these tools to check the results of your own calculations. Don't fool yourself by having it do your homework for you!