Given a straignt line on a graph, how do you determine the equation for this line?

We know that a straight line is of the form **y = mx + c** – this means that what we need to find out is the 2 constants ‘**m**‘ and ‘**c**‘.

So how is this done?

Well! in a previous post, we looked at how to plot a linear equation on a graph using the slope and y-intercept mehod. In this article, we will be doing the reverse process; which is:

- Finding the
**y-intercept**– this will give us constant ‘**c**‘ in the equation, and - Finding the
**slope**of the line – which will give us constant ‘**m**‘ in the equation.

Watch this video for an example.