Save guides, add subjects and pick up where you left off with your BBC account. The graphs of \(y = 2x + 1\) and \(y = 2x - 2\) are shown below. The graph of \(y = 2x + 1\) crosses the \(y\)-axis ...

{2}x - 4\). First, find the perpendicular gradient and substitute this into the equation for all straight lines, \(y = mx + c\). If \(y = 3x - 1\) the gradient of the graph is 3. This means the ...