Question

Which of the following equations is of a parabola with a vertex at (0, -3)?

a) y = (x - 3)^2
b) y = (x + 3)^2
c) y = x2- 3
d) y = x2+ 3

Answer 1

@AmtalArzoe

Answer 2

hmmm, notice all choices are already in "vertex form"

http://nayak2010.files.wordpress.com/2011/01/picture-of-vertex-form-of-parabola.png

Answer 3

a?

Answer 4

C is the right answer. Because x^2 >= 0, therefore min x^2 = 0, min y = -3.
Hence vertex at (0,-3)