Differentiate between a positive linear relationship and a ...

[Kikoku]

Differentiate between a positive linear relationship and a negative linear relationship between variables.

Question 2

What is a scatter diagram, and for what kind of data is it a useful descriptive device?

[mbcrismon]

Answer to Question 1

In a positive linear relationship, y tends to increase linearly with increases in x. In a negative linear relationship, y tends to decrease linearly as x increases.

Answer to Question 2

A scatter diagram is a plot in which each point represents a pair of known or observed values of x and y. The variables are represented on the horizontal (x) and vertical (y) axes. The scatter diagram is useful in examining whether the variables might be related to each other in some way.