Which function has an axis of symmetry of x is equal to negative 2 ?
Answer
A
f of x is equal to x negative 2 squared negative 1
B
f of x is equal to x plus 2 squared negative 1
C
f of x is equal to x plus 1 squared negative 2
D
f of x is equal to x negative 1 squared plus 2
Explanation
A function in vertex form, f(x) = (x − h)² + k, has an axis of symmetry at x = h. Choice B is f(x) = (x + 2)² − 1 = (x − (−2))² − 1, so its axis is x = −2.
AI-written and checked against the verified answer.