Question

18
where is the function increasing?

Explanation:

Step1: Recall increasing - function concept

A function $y = f(x)$ is increasing when, as $x$ increases, $y$ also increases. For a graph of a function, it means the graph is going up from left - to - right.

Step2: Analyze the given graph

Looking at the parabola, we can see that as we move from left to right, the graph is going up until we reach the vertex of the parabola. The vertex of the parabola has an $x$ - coordinate of $x = 1$.

Answer:

The function is increasing on the interval $(-\infty,1)$.