GCSE Edexcel Straight line graphs - Edexcel y = mx + c Graphs show the relationship between two variables and are often seen in newspapers and the media. People who work in professions involving ...

Save guides, add subjects and pick up where you left off with your BBC account. If an equation can be rearranged into the form \(y = mx + c\), then its graph will be a straight line. In the above ...

The top part of that image is the equation itself. The bottom part is a graph of the equation, which, as you can see, is exactly the same. To be fair, this equation cheats a little bit.

One way to assess this fluctuating data is to add a linear trend line to the Excel 2013 graph. This visual element considers all the data and displays the overall direction the values are taking.