Answer:
x = -1
Step-by-step 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.
