Supplement color-coding of graphs and charts with simple patterns to improve accessibility for colorblind users. Charts should be readable in black and white. For more information on these and other ...

Draw the graph of \(y = 3x - 1\). If you recognise this as a straight line then just choose two ‘easy’ values of \(x\), work out the corresponding values of \(y\) and plot those points.

Just two points are needed to draw a straight line graph, although it is a good idea ... If you recognise this as a straight line then just choose two ‘easy’ values of \(x\), work out the ...