The line l1 l_1\,l1 has equation y=3x−7y = 3x - 7y=3x−7.
The line l2 l_2\,l2 is perpendicular to l1 l_1\,l1 and passes through the point (6,2)(6, 2)(6,2).
Find an equation for l2l_2l2, giving your answer in the form y=mx+cy = mx + cy=mx+c.
143 exam-style questions on OCR A Level Maths 1.3 Coordinate Geometry in the x-y Plane, covering 1.3.1 Straight lines, 1.3.2 Parallel and perpendicular lines, 1.3.3 Straight line models, 1.3.4 Coordinate geometry of a circle, 1.3.5 Centre and radius by completing the square, 1.3.6 Circle properties, 1.3.7 Parametric equations of curves (A-level only), 1.3.8 Parametric equations in context (A-level only), and 1.3 Coordinate Geometry in the x-y Plane. Each one has a worked solution and a mark scheme showing where the marks go.