Since the parabola opens downwards, its maximum y-value is reached at the vertex.
5
Practice makes perfect
To identify the maximum y-value of the given parabola, we have to find the vertex of the parabola. Let's start by labeling it on our graph.
We can see above that the vertex is the point ( 2,5). Since the parabola opens downwards, it has a maximum value that is reached at the vertex. Thus, the maximum y- value is y=5.
