Question

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

Explanation:

Step1: Identify the vertex

The graph is a parabola opening upwards, so the vertex is the minimum point.

Step2: Determine the y - coordinate of the vertex

From the graph, the lowest point (vertex) has a y - coordinate of - 9 (by observing the grid, the vertex is at a position where y=-9).

Answer:

-9