Mathematics
Grade-8
Easy

Question

Identify the intervals in which the function is increasing.

  1. 1 and 3
  2. 1
  3. 2 and 4
  4. 3 and 5

hintHint:

We need to find the function is increasing interval in graph the slope of the function would be positive. And you and also get the constant interval if the particular interval line is horizontal.

The correct answer is: 1


    Here we have to find out the increasing intervals.
    Firstly, we must look the graph that how many intervals are given,
    In this graph, There are total 5 interval were given .
    For increasing interval , the line must be upward line or the slope of line would be positive.

    If we can see each interval,
    In (1) interval the line going upward while moving towards left to right, then it is increasing interval.
    In (2) interval the line going horizontally while moving towards left to right , then it is constant interval.
    In (3) interval the line going downward while moving towards left to right , then it is decreasing interval.
    In (4) interval the line going horizontally while moving toward left to right, then it is constant interval.
    In (5) interval the line going downward while moving toward left to right ,then it is decreasing interval.
    Hence, the given intervals having 1 interval which function is increasing which is (1).
    The correct answer is 1 (option (b)) .
    graph

    For finding the increasing functions in interval you must consider the given interval will be going upward from left to right and you can see find the slope of interval if its positive  then its increasing.

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