TREND

Definition of Trend

If the values of one set of data increases and the values of other set also increases then the two sets of related data shows a positive trend. If the values of one set of data increases and the values of other set decreases then the two sets of related data shows a negative trend. If the data shows no relation then that set shows no trend.

If the data values of a set increases and the data values of other set also increases then the two sets of related data shows a positive trend. If the data values of one set increases and the data values of other set decreases then the two sets of related data shows a negative trend. If the data shows no relation then that set shows no trend.

More About Trend

  • Trend Line - In a scatter plot, a line that closely fits the data points is called a Trend line
  • If one set of data increases, then the other set tends to decrease then the trend shown is called a negative trend.

Video Examples: Trends in International Math and Science Study


  • If increase in one set of data causes the other set to increase, then the trend shown is called a positive trend.
  • If one set of data increases, then the other set does not seem to increase or decrease then it does not have any trend.

Examples on Trend

    As the number of apples in the bag increases, the weight of the apple bag also tends to increase. So, the scatter plot shows a positive trend.
    As the supply of an item increases, the price of the item decreases and as the supply decreases, the price of the item increases. So, the scatter plot follows a negative trend.
    It can be observed that as the temperature increases, the number of points scored in the game tends to increase or decrease without any relationship. So, the scatter plot follows no trend.

Solved Example on Trend

Ques: Describe the trend shown by the scatter plot.

    Choices:
    A. No trend
    B. Positive trend
    C. Negative trend
    Correct Answer: B

Solution:

    Step 1: Each point in the scatter plot denotes the depth of water in the respective two-minute interval
    Step 2: As the time in minutes increases, the depth of water in the bathtub tends to increase. So, the scatter plot shows a positive trend.

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