The line l1 l_1\,l1 has gradient 2 and passes through (5,7)(5, 7)(5,7).
Show that an equation for l1 l_1\,l1 in the form y=mx+cy = mx + cy=mx+c is y=2x−3y = 2x - 3y=2x−3
l2 l_2\,l2 is perpendicular to l1 l_1\,l1 and passes through (0,1)(0, 1)(0,1). Show that an equation for l2 l_2\,l2 is y=−12x+1\displaystyle y = -\frac{1}{2}x + 1y=−21x+1.
260 exam-style questions on Edexcel A Level Maths Straight Line Graphs, covering 5.1 y = mx + c, 5.2 Equations of Straight Lines, 5.3 Parallel and Perpendicular Lines, 5.4 Length and Area, and 5.5 Modelling with Straight Lines. Each one has a worked solution and a mark scheme showing where the marks go.