Show that line 3y=4x−k3y = 4x - k3y=4x−k is perpendicular to line 4y=−3x+484y = -3x + 484y=−3x+48 for all values of kkk
130 exam-style questions on Eduqas GCSE Maths Perpendicular Lines and the equation of a tangent. Each one has a worked solution and a mark scheme showing where the marks go.