1. Find the number of zeroes of the polynomial y = f(x) whose graph is given in figure.
2 Find the circumcentre of the triangle whose vertices are (-2, -3), (-1, 0) and (7,-6). (3,-3)
3. Find the equation to the pair of lines passing through (2,-3) and perpendicular to 3x^{²} - 2xy - 4y^{² }= 0.