Question

look at this graph:
graph of a parabola opening downward with vertex in the first quadrant, passing through the origin, and intersecting the x-axis at (0,0) and (4,0) approximately, with y-axis from -10 to 10
what is the maximum value of this function?
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Explanation:

Step1: Identify the vertex

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

Step2: Read y-value of vertex

From the graph, the vertex has a y-coordinate of 3.

Answer:

3