Maths-
General
Easy

Question

By completing scatter plots for each of the following data sets, describe the correlation between x and y as positive, negative or none.

hintHint:

A scatter plot has points that show the relationship between two sets of data. If the points in a scatter plot are widely spread, we may not be able to describe the correlation among the variables.
We are asked to graph the scatter plot and find whether the correlation is positive, negative or none.

The correct answer is:


    Step 1 of 2:
    The coordinate points corresponding to the table values are:
    (28,13),(32,25),(16,22),(19,21),(21,16),(24,9),(27,19),(25,25),(30,15),(18,12)
    The scatter plot based on the set of points is:

    Step 2 of 2:
    Analyzing the graph, it is clear that the points are scattered around. It is not possible to drawn a trend line. If we could draw one, it might not describe the actual behavior of the values.
    Thus, we can say that there is no correlation among the variable x and y.
     

     
    It necessary for every scatter plot to have a trend line.

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