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 vertex is at a point where the y - value (the function's value) is - 2 (by looking at the grid, we can see that the lowest point of the parabola is at y=-2).

Answer:

-2