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 method. 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.