Question

Which of the following equations is of a parabola with a vertex at (0, -5)?

Answer 1

a)y = (x - 5)2

b)y = (x + 5)2

c)y = x2 - 5
or
d)y = x2 + 5

Answer 2

Do you know this conics formula?
y=a (x-h)^2 + k

Answer 3

oh yea so d? @study100

Answer 4

the vertex is (h,k)
in our case (0,-5)
plug this into the formula
y=a(x-0)^2-5
then y=ax^2-5
in your question they didn't consider a
so it should be y=x^2-5