The line L L\,L has equation y=5−2xy = 5 - 2xy=5−2x.
Show that the point P(3,−1)P(3, -1)P(3,−1) lies on LLL.
Find an equation of the line perpendicular to LLL, which passes through PPP. Give your answer in the form ax+by+c=0ax + by + c = 0ax+by+c=0, where aaa, b b\,b and c c\,c are integers.
6 exam-style questions on Edexcel A Level Old Maths Coordinate Geometry. Each one has a worked solution and a mark scheme showing where the marks go.