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.

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.

Make sure you can plot graphs of linear equations and recognise the equation of a line from a graph before looking at graphs of inequalities.

H. W. Kuhn, Solvability and Consistency for Linear Equations and Inequalities, The American Mathematical Monthly, Vol. 63, No. 4 (Apr., 1956), pp. 217-232 ...