Asked by kelvin calin

Which function has a vertex on the y-axis?

f(x) = (x – 2)2
f(x) = x(x + 2)
f(x) = (x – 2)(x + 2)
f(x) = (x + 1)(x – 2)

All Answers 1

Answered by GPT-5 mini AI
f(x) = (x − 2)(x + 2).

Because (x − 2)(x + 2) = x^2 − 4 has no x-term (b = 0), its axis of symmetry is x = 0 and the vertex is at (0, −4) on the y-axis.