Answer :
When the r value of two variables is greater than 0.7, the relationship is considered strong. The correlation r of two quantitative variables measures the strength of their linear relationship.
A scatter plot is a type of plot or mathematical diagram that displays values for two variables for a set of data using Cartesian coordinates. One more variable can be displayed if the points are coded.
Scatter plots are used to show how much one variable affects another by plotting data points on a horizontal and vertical axis. Each row in the data table is represented by a marker, the position of which is determined by the values of the columns set on the X and Y axes. A scatter plot is a collection of points plotted on two axes, horizontal and vertical.
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