If the y-value decreases as the x-value increases then you have a negative correlation. Meaning that the line-of-fit has a negative slope.

What is a line-of-fit? Given a data set, plot the ordered pairs on a graph. It looks like a scatter plot. Now estimate, and draw a line that best fits what the data represents. That is your line-of-fit.

If the y-value increases as the x-value increases then you have a positive correlation. Meaning that the line-of-fit has a positive slope.

If the y-value decreases as the x-value increases then you have a negative correlation. Meaning that the line-of-fit has a negative slope.

What is a line-of-fit? Given a data set, plot the ordered pairs on a graph. It looks like a scatter plot. Now estimate, and draw a line that best fits what the data represents. That is your line-of-fit.

In this video lesson students learn how to graph data on a coordinate plane and draw a line of fit for that data.

This video explains the different types of study designs used in statistics. [9:51]

Video uses a real world medical article as an example to explain the difference between correlation and causation. [10:45]

This lesson will define correlations in psychological research and explore the various types. It is 6 of 9 in the series titled "Correlation."

Learn about positive correlation by watching this tutorial. [1:06]

Learn about line-of-fit, negative slope, and negative correlation by watching this tutorial. [1:02]

Learn about no correlation and see how to tell if data shows no correlation by watching this tutorial. [1:07]

Explore linear regression and correlation in this video.

This tutorial takes you through the steps of creating a scatter plot, drawing a line-of-fit, and determining the correlation if any. [1:40]

This tutorial takes you through the steps of creating a scatter plot, drawing a line-of-fit, and determining the correlation if any. [1:53]

This episode talks about data relationships and what we can learn from them. We'll focus on correlation, which is a measure of how two variables move together, and we'll also introduce some useful statistical terms you've probably heard...

This tutorial takes you through the steps of creating a scatter plot, drawing a line-of-fit, and determining if there is any correlation. [1:56]

In this video lesson, students estimate the line of best fit from a scatter plot. [1:16]

Video uses a real world medical article as an example to explain the difference between correlation and causation. Understanding why correlation does not imply causality (even though many in the press and some researchers often imply...

This lesson will explain guidelines for establishing causality. It is 4 of 4 in the series titled "Establishing Causality."

This lesson defines correlation as the relationship between variables presented on a scatter plot.

This lesson defines correlation as the relationship between variables presented on a scatter plot.

This lesson defines correlation as the relationship between variables presented on a scatter plot. This is part of a series of lessons about topics related to scatter plots. It is 2 of 9 in the series titled "Correlation.' [3:31]

This lesson defines correlation as the relationship between variables presented on a scatter plot. This is part of a series of lessons about topics related to scatter plots. It is 3 of 9 in the series titled "Correlation." [2:04]