Answer:
A
Step-by-step explanation:
Given a quadratic function in standard form
y = ax² + bx + c ( a ≠ 0 )
• If a > 0 then the graph opens upwards
• If a < 0 then the graph opens downwards
y = - x² + 4x + 3 ← is in standard form
with a = - 1 < 0
The graph therefore opens downward
