A straight line, LLL, passes through the point with coordinates (4,7)(4, 7)(4,7) and is perpendicular to the line with equation y=2x+3y = 2x + 3y=2x+3.
Verify that an equation of the straight line L L\,L is y=−12x+9\displaystyle y = -\frac{1}{2}x + 9y=−21x+9.
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.