The line l1 l_1\,l1 has the equation 5y−10=2x5y - 10 = 2x5y−10=2x The point P P\,P with x x\,x coordinate 4 lies on l1l_1l1. The line l2 l_2\,l2 is perpendicular to l1 l_1\,l1 and passes through the point PPP.
Find an equation for l2 l_2\,l2 in the form ax+by+c=0ax + by + c = 0ax+by+c=0
The lines l1 l_1\,l1 and l2 l_2\,l2 cross the x x\,x axis at the points Q Q\,Q and R R\,R respectively. Calculate the area of the triangle QPRQPRQPR.
21 exam-style questions on Edexcel AS 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.