A parabola has a vertex at (-1, 0) and opens down. What is the equation of the parabola? y = -x 2 - 1

Question

A parabola has a vertex at (-1, 0) and opens down. What is the equation of the parabola?

y = -x ² - 1

Answer 1

f(x) = a(x - h)² + k, where (h, k) is the vertex

f(x) = -(x + 1)² + 0