Show that line 3y=12x−93y = 12x - 93y=12x−9 is perpendicular to line 12y=−3x+6012y = -3x + 6012y=−3x+60
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.