Drawing the Line of Best Fit in Scatterplots

This video tutorial from Moomoomath explains how to create scatter plots and draw the line of best fit. It covers identifying correlation types—negative, positive, or none—and provides tips for drawing the line of best fit. The video includes examples of scatter plots with high and weak correlations, demonstrating how to adjust the line of best fit accordingly. It concludes with advice on handling scatter plots with no correlation.

What are the three types of correlation that can be determined from a scatter plot?

• Strong, Weak, and No Correlation

• Positive, Negative, and Weak Correlation

• High, Medium, and Low Correlation

• Positive, Negative, and No Correlation

What is the first step in drawing the line of best fit?

• Determine the direction of the slope

• Draw the line in the middle of the data

• Ensure equal distance from the line

• Count the number of dots on each side

When drawing the line of best fit, where should the line be positioned?

• At the top of the data points

• In the middle of the data points

• To the left of the data points

• At the bottom of the data points

What should you try to achieve with the dots on both sides of the line of best fit?

• More dots on one side

• Equal number of dots on both sides

• All dots on one side

• No dots on either side

What makes drawing the line of best fit easier in a scatter plot with high correlation?

• The dots are clustered in one area

• The dots are spread out

• The dots form a clear pattern

• The dots are random

What is a challenge when drawing the line of best fit for a scatter plot with weak correlation?

• The line is always vertical

• The line is always diagonal

• The line is difficult to position accurately

• The line is always horizontal

In the first example, how many dots were on one side of the line of best fit?

• 25

• 29

• 33

• 27

After redrawing the line of best fit, how many dots were on one side in the second example?

• 27

• 29

• 25

• 33

What should you do if a scatter plot looks like just a bunch of dots?

• Draw the line of best fit at the top

• Draw the line of best fit at the bottom

• Draw the line of best fit in the middle of the data points

• Ignore the line of best fit

What is the final advice given for drawing the line of best fit?

• Always draw a vertical line

• Take your best guess

• Always draw a horizontal line

• Always use a ruler