Final answer:
The axis of symmetry for the function y = 4x² + 16x - 2 is the vertical line x = -2, found by using the formula x = -b/(2a).
Step-by-step explanation:
The axis of symmetry for a quadratic equation in the form y = ax² + bx + c can be found using the formula x = -b/(2a). For the given equation y = 4x² + 16x - 2, a is 4 and b is 16.
Applying the formula, the axis of symmetry is x = -16/(2 × 4) = -16/8 = -2.
Therefore, the axis of symmetry for the equation y = 4x² + 16x - 2 is the vertical line x = -2.