Answer:
Equation of parabola is y = x² - 5 .
Step-by-step explanation:
Given : parabola with a vertex at (0, -5).
To find : which of the following equations is of a parabola.
Solution : We have given vertex at (0, -5).
Vertex form of parabola y = a(x - h)² + k .
Where (h ,k ) is vertex
We have h = 0 , k = -5 .
Equation : y = 1(x - 0)² - 5
y = x² - 5 .
Therefore, Equation of parabola is y = x² - 5 .