The required interval of the graph in which function is increasing (-∞, -2.5) and (1, ∞).
What is graph?
The graph is a demonstration of curves which gives the relationship between x and y axis.
As per observation of the graph the curve is increasing from (-∞, -2.5) of abscissa and than decreasing from (-2.5, 1) and than again increasing from (1, ∞).
Thus, the required interval of the graph in which function is increasing (-∞, -2.5) and (1, ∞).
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