Answer:
maximum value
Step-by-step explanation:
Given a parabola in vertex form
y = a(x - h)² + k
where (h, k) are the coordinates of the vertex and a is a multiplier
• If a > 0 then minimum value of k
• If a < 0 then maximum value at k
Given
y = - 3(x + 1)² + 4
a = - 3 < 0 ⇒ maximum value
The maximum value is the y- coordinate of the vertex
That is k, thus maximum value = 4
