There are 21 questions in a quiz. Every correct answer scores 3 points
Each incorrect answer loses 2 points.
A question not answered scores 0 points.

A student has 6 correct what is the answer

The general form of the quetion of a circle is ax^2+by^2+cx+dy+e=0 where a=b=0 if the circle has a radius of three units and the center lies on the y axis which set of values of a, b, c, d, and e might correspond to the circle