The line l2 l_2\,l2 has the equation 25x+10y−136=025x + 10y - 136 = 025x+10y−136=0 The point P P\,P with x x\,x coordinate 4 lies on l2l_2l2. The line l1 l_1\,l1 is perpendicular to l2 l_2\,l2 and passes through the point PPP.
Find an equation for l1 l_1\,l1 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.
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.