Question

Use the graph of f to find (a) the largest open interval on which f is increasing, and (b) the largest open interval on which f is decreasing.

y = x^3/4 - 3x

Answer 1

Step 1 :

Observe the graph :

The graph of is increasing on the interval and

The graph of is decreasing on the interval 

Solution :

The function is increasing on the interval and

The function is decreasing on the interval