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