The line l1 l_1\,l1 has gradient 3 and passes through (−2,5)(-2, 5)(−2,5).
Show that an equation for l1 l_1\,l1 in the form y=mx+cy = mx + cy=mx+c is y=3x+11y = 3x + 11y=3x+11
l2 l_2\,l2 is perpendicular to l1 l_1\,l1 and passes through (0,4)(0, 4)(0,4). Show that an equation for l2 l_2\,l2 is y=−13x+4\displaystyle y = -\frac{1}{3}x + 4y=−31x+4.
Show that the coordinates of the point where l1 l_1\,l1 and l2 l_2\,l2 intersect are (−2.1,4.7)(-2.1, 4.7)(−2.1,4.7).
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.