If an equation can be rearranged into the form \(y = mx + c\), then its graph will be a straight line. In the above: \(x + y = 3\) can be rearranged as \(y = 3 - x\) (which can be re-written as ...

A line graph is used to spot trends in data over ... The scale is going up in increments of 10. Between each multiple of 10 is ten subdivisions. Each subdivision is worth 1 TWh (Terawatt hour).