Scatter Graphs Line of Best Fit

The video tutorial explains how to draw a line of best fit on a scatter graph. It covers the definition of a line of best fit, guidelines for drawing it, and how to use it for estimating values. The video also addresses situations where no correlation exists in scatter plots, making it impossible to draw a line of best fit. A practice question is provided for viewers to apply the concepts learned.

What is the primary purpose of a line of best fit in a scatter graph?

• To connect all the data points

• To divide the graph into two equal parts

• To highlight the highest and lowest points

• To show the general trend of the data

Which of the following is NOT a requirement for drawing a line of best fit?

• It should be a straight line

• It must pass through the origin

• It should follow the steepness of the plots

• There should be a balance of plots above and below the line

When drawing a line of best fit, what should be considered about the plots?

• There should be an equal number of plots above and below the line

• The line should only touch the first and last plots

• All plots should be below the line

• All plots should be above the line

How can a line of best fit be used once it is drawn?

• To delete outliers from the data

• To estimate values based on the data

• To change the data points

• To create a new scatter plot

What should you do if a scatter plot shows no correlation?

• Connect the dots with a zigzag line

• Do not draw a line of best fit

• Use a curved line instead

• Draw a line of best fit anyway