Question

look at this graph:
what is the maximum value of this function?

Explanation:

Step1: Identify the vertex

The graph is a downward-opening parabola, so its maximum value is at the vertex, the highest point on the curve.

Step2: Read vertex y-coordinate

The vertex lies on the y-axis at $(0, 7)$, so the y-value is 7.

Answer:

7