Suppose you are given this equation y = 5x + 1 – how do you then plot this equation on a graph using just the equation – that is without using a table of values ?
The answer to the above is in using the value of the SLOPE of the equation – in this exampe 5 – and the value for the Y-INTERCEPT which is +1.
- The y-intercept will give us the first point on the y-axis, and
- The slope will allows us to work out the next point using the RISE over RUN formula. (Note: Linear equations with a slope having a negative value are addressed in this video lesson ‘graphing linear equations.’
Watch this short video for an example of how it is done .
The full video lesson on graphing linear equations is found here