[tex]\begin{gathered} \text{Judging from the graph }f,\text{ the intervals for which the graph is increasing are} \\ (-\infty,-4\rbrack,\text{ }\lbrack-2,2\rbrack,\text{ }\lbrack7,\infty) \\ \\ \text{these are apparent when the slope of the graph is positive.} \end{gathered}[/tex]
