The line l1 l_1\,l1 has gradient 3 and passes through (4,11)(4, 11)(4,11).
Find an equation for l1 l_1\,l1 in the form y=mx+cy = mx + cy=mx+c
l2 l_2\,l2 is perpendicular to l1 l_1\,l1 and passes through (3,5)(3, 5)(3,5). Find an equation for l2l_2l2.
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.