Question

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

Explanation:

Step1: Identify the vertex

The minimum of a parabola opening upwards is at its vertex. In the graph, the vertex is the lowest - point of the parabola.

Step2: Read the y - coordinate of the vertex

The vertex of the given parabola is at the point $(0, - 5)$. The y - coordinate of the vertex gives the minimum value of the function.

Answer:

$-5$