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Scatter Plot and Line of Best Fit




 


Videos, worksheets, stories and songs to help Grade 8 students learn about Scatter Plots, Line of Best Fit and Correlation.

A scatter plot or scatter diagram is a two-dimensional graph in which the points corresponding to two related factors are graphed and observed for correlation. A downward trend in points shows a negative correlation. An upward trend in points shows a positive correlation. If there is no trend in graph points then there is no correlation.

Scatter Plot
In this video, you will learn that a scatter plot is a graph in which the data is plotted as points on a coordinate grid, and note that a "best-fit line" can be drawn to determine the trend in the data. If the x-values increase as the y-values increase, the scatter plot represents a positive correlation. If the x-values increase as the y-values decrease, the scatter plot represents a negative correlation. If the data is spread out so that it is not possible to draw a "best-fit line", there is no correlation.
Creating a Scatter Plot.



Learn Scatter Plots and Best Fitting Lines. This video explains what a scatter plot is and how to find the best fitting line.
In this video, you will learn about scatter plot graphs, correlation, line of best fit, univariate data and bivariate data.


 
Scatter Plots : Introduction to Positive and Negative Correlation.
Interpreting Scatterplots
Starts with a description of how to plot a scatterplot from a table. At the 2:24 mark it talks about how to interpret scatterplots in terms of direction, form, strength and outliers.


Rotate to landscape screen format on a mobile phone or small tablet to use the Mathway widget, a free math problem solver that answers your questions with step-by-step explanations.


You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.


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