the points A and B lie on a circle with centre P, as shown in figure 3.
the point A has coordinates (1,-2) and the midpoint M of AB has coordinates (3,1).
The line l passes through the points M and P.
a)find an equation for l.
Given that the x-coordinate of P is 6,
b) use your answer to part (a) to show that the y-coordinate of P is -1
(i could do this bit if i had the equation)
c) find an equation for the circle