Point C C\,C has coordinates (2,c)(2, c)(2,c) and point D D\,D has coordinates (d,k)(d, k)(d,k).
The perpendicular bisector of CD CD\,CD has equation 3y+x=103y + x = 103y+x=10.
Find c c\,c and d d\,d in terms of kkk.
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.