Which of the following equations is of a parabola with a vertex at (3, 0)? y = (x - 3)2 y = (x + 3)2 y = x2 - 3 y = x2 + 3

That would be y = (x - 3)^2  Answer

The answer is A. y=(x-3)^2

The first one, i believe, would be correct. all the others have one thing in common, and that's that they have repeating numbers. in the second one, x and y have repeating 6's and 3's, and in the third, x and y have repeating 6's as well. in the last one, there are repeating 3's. the first one has no repeating numbers.