Any equation that can be rearranged into the form \(y = mx + c\), will have a straight line graph. \(m\) is the gradient, or steepness of the graph, and \(c\) is the \(y\)-intercept, or where the ...

The constant term in the equation (the + 1 or ‒ 2) shows the point where the graph crosses the \(y\)-axis. This is known as the \(y\)-intercept ... going down zero - no change (a flat line ...