Using $y = mx + c$: Key Skills

1 · Reading the gradient and $y$-intercept 2 · Is the point on the line? 3 · Gradient from two points 4 · Making $y$ the subject: one step 5 · Dividing every term 6 · Making $y$ the subject: two steps 7 · Finding $c$ 8 · Perpendicular gradients 9 · Making $x$ the subject 10 · Intercepts with the axes Mixed 1–10