The line l l\,l has equation 2x+5y−20=02x + 5y - 20 = 02x+5y−20=0
l l\,l crosses the xxx-axis at the point A A\,A and the yyy-axis at the point BBB.
Write down the coordinates of A A\,A and of BBB.
Find the area of triangle OABOABOAB, where O O\,O is the origin.
The point C C\,C has coordinates (5,2)(5, 2)(5,2). Show that C C\,C lies on lll.
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.