Aline passes through the point (d, d) and has a slope of k. which equation models the line?

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

Me with this one question, and i'll upvote the brainliest answer

Over which interval is the graph of f(x) = x2 + 5x + 6 increasing?