What is the axis of symmetry for the function? y = x2 + 3x - 4

y = -2

x = -2

x = -1.5

y = -1.5

what is the vertex for the function? y = x2 - 4x - 3

(-1, 2)

(0, -3)

(1, -6)

(2, -7)

the vertex of y = 9 - 8x - x2 is (-4, 25)

false
true

Axis of symmetry is a line passing through the vertex which divides the curge into two parts such tha each part looks the same.
For , the 'x' part is squared and the coefficient of is positive. Hence, the curve will be a parabola facing up which means that the axis of symmetry will be a vertical line. i.e. x = m.
Investigating, f(-1) =
f(-1.5) =
f(-2) =
From these, the curve has a vertex at point (-1.5, -6)
Therefore the axis of symmetry is line x = -1.5 (i.e. the third option)