The diagram shows line with equation y+3x=2y + 3x = 2y+3x=2 which is a tangent to a circle with centre (11,−1)(11, -1)(11,−1).

Find an equation for the circle.
143 exam-style questions on AQA A Level Maths 1.6 C: Coordinate geometry in the (x, y) plane, covering 1.6.1 Equation of a straight line, 1.6.2 Coordinate geometry of the circle, 1.6.3 Parametric equations of curves (A-level only), and 1.6.4 Parametric equations in modelling (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.