Question 1
Which answer below makes the statement true?
The vertex of a parabola is the … point if .
O highest
lowest

When , the parabola opens upwards, which means the vertex forms the lowest point of the graph. This is where the parabola changes direction, making it the minimum value of the function represented by the parabola.

Conversely, if , the parabola would open downwards, setting the vertex as the highest point. So, always remember the vertex’s role in determining the parabola’s orientation!