Plot points with coordinates where \(x\) and \(y\) are equal. Three points are sufficient, but more can be plotted. Draw a line through the plotted points. If \(x\) is positive, \(y\) is negative. If ...

A conversion graph is used to change one unit into another. This could be changing between miles and kilometres, pounds to a foreign currency, or the cost of a journey based on the number of miles ...