Capture relationships between data sets by graphing linear equations in Microsoft Excel 2007. Linear equations allow you to predict values within your data set and view the overall trend.

Revise how to plot a linear equation graph. Learn how to read x and y coordinates from a graph in this BBC Bitesize maths KS3 guide.

At the point (or points) where two graphs intersect, the x and y values are the same for both functions. We use this information to find the solution to simultaneous linear equations.