Question

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

Explanation:

Step1: Identify vertex of parabola

The graph is a parabola opening upward, so its minimum value is at the vertex.

Step2: Read vertex y-coordinate

The vertex of the parabola is at the point $(0, -8)$, so the y-value (function value) at this point is $-8$.

Answer:

$-8$