The line l l\,l passes through the points A(1,2)A(1, 2)A(1,2) and B(−2,8)B(-2, 8)B(−2,8).
Find the gradient of lll.
Hence find an equation for lll.
Find the exact length of ABABAB
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.