Line of Best Fit

To show the overall trend of a data set, we can use a ​Line of Best Fit.

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A line of best fit should:

• Follow the trend of the data

• Split the data in half

• Help to estimate or predict values that are not already given in the set.

Line of Best Fit

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Multiple Choice

Which of the following lines represents the line of best fit for the scatter plot?

• A
• B
• C
• D

Multiple Choice

Which of the following lines represents the line of best fit for the scatter plot?

• A
• B
• C
• D

Multiple Choice

Describe this scatter plot

• It has a strong negative correlation

• it has a weak positive correlation

• no correlation

• It has a strong positive correlation

Multiple Choice

Describe this scatter plot

• weak postive correlation

• weak negative correlation

• no correlation

• ham and cheese

Multiple Choice

Describe this scatter plot

• mid strong correlation

• weak negative correlation

• strong negative correlation

• no correlation

Multiple Choice

Describe this scatter plot

• Stong positive correlation

• Mid positive correlation

• Mid negative correlation

• Weak negative correlation

Multiple Select

Describe this scatter plot

• no correlation

• positive correlation

• negative correlation

Multiple Choice

Is this line an accurate line estimate of best fit for the data?

• Yes

• No

Multiple Choice

Is this line an accurate line estimate of best fit for the data?

• Yes

• No

Multiple Choice

Which line is the best line of best fit?

• a

• b

• c

• i don't see any lines

Multiple Choice

Which line is line of best fit for the data?

Match

Match each scatter plot to its description.

Positive Correlation

Negative Correlation

No Correlation

• Positive Correlation

• Negative Correlation

• No Correlation

Multiple Choice

Which line appears to fit the data better?

• line A

• line B

Multiple Choice

Select the statement that best describes the line.

• The line is the line of best fit.
• The line is NOT a line of best fit because it does not pass through two points.
• The line is NOT a line of best fit because it does not go through the middle of the data set.
• The line is NOT a line of best fit because it does not go through the origin.

Multiple Choice

Which shows a line of best fit?

Multiple Choice

What is a line of best fit used for?

• To make predictions
• To make the graph look pretty
• To connect the points
• To make it look like you know what you are doing

Multiple Choice

The scatter plot shows the relationship between the number of chapters and the total number of pages for several books.  Use the trend line to predict how many chapters would be in a book with 180 pages. 

• 12 chapters
• 15 chapters
• 18 chapters
• 21 chapters