Answer:
(2, -10)
Explanation:
This shape is a parabola. It is a curve. In a triangle or square, the vertex (plural vertices) are the corners.
On a parabola, the vertex is that very far bottom point that (in this graph) is the lowest point. You could fold this shape in half right through the vertex and both sides would exactly match up. In case you have more problems like this one, parabolas can also open downward, or even left opening or right opening. But in each case, the point where the curve makes the u-turn is the vertex.