Question

If a parabola has x-intercepts of 3 and -5, what is the equation of it’s axis of symmetry

Answer 1

x = -1

Explanation:

The x value of the axis of symmetry is precisely halfway between the two given x-intercepts: -5 and 3 are 8 units apart. Add half of 8 units, or 4 units, to -5, to obtain:

-5 + 4 = -1

The equation of the axis of symmetry is therefore x = -1.