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A scatter plot is a graphical representation of the relationship between two variables and this relationship is usually plotted on an X-Y coordinate axis. A scatter plot is generally marked with dots and it clearly shows how the variables vary with respect to each other, and based on this representation many conclusions and estimations regarding the variables are calculated. When we join the major portion of dots, we get a straight line known as the ‘line of best fit’ and this is the line that best fits the data.
Example 1: Analyze whether the scatter plot given below has positive trend, negative trend or no trend?
A scatter plot shows positive trend if ‘y’ value tends to increase as ‘x’ value increases.
A scatter plot shows negative trend if ‘y’ value tends to decrease as ‘x’ value increases.
A scatter plot is said to have no trend if no general pattern is observed.
The above given scatter plot shows positive trend because clearly as ‘x’ is increasing, ‘y’ values are also increasing moving upward!
Example 2: Analyze whether the scatter plot given below has positive trend, negative trend or no trend?
The above given scatter plot shows negative trend because clearly as ‘x’ is increasing, ‘y’ values are decreasing thus moving downward!
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