Graphical descriptive techniques II - Describing the relationship between two interval variables

3 important questions on Graphical descriptive techniques II - Describing the relationship between two interval variables


How do you call a plot of points of one variable against another which illustrates the relationship between them?

Scatter diagram

How do you call a relationship one in which two variables tend to increase and decrease in the same proportion?

Linear relationship

How do you call a relationship one in which the values of one variable tend to move in opposite directions from eachother?

Negative linear relationship

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