For the graph to the right find the intervals of a Increase

For the graph to the right, find the interval(s) of a. Increase b.

Solution

we know that the graph is increasing when slope of garph is positive and decreasing when the slop of graph is negative

From the given graph the

(a) slop of graph from (-infinity, -1] is positive hence (-infinty,-1] is increasing

(b)Again slop of graph from [0, infinity) is positive hence [0, infinity) is increasing