Line of Best Fit Worksheet
Grade 11 Math worksheet focusing on understanding, drawing, and interpreting the line of best fit for scatter plots.
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Topics
Line of Best Fit
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Read each question carefully and provide your best answer. For questions involving graphs, draw your line of best fit clearly and use it to answer any related questions.
1. Which of the following best describes the purpose of a line of best fit?
To connect all the data points on a scatter plot.
To identify outliers in the data set.
To represent the general trend of the data and make predictions.
To calculate the exact mean of the x and y values.
2. A scatter plot shows a strong positive correlation. What would be the general slope of the line of best fit?
Negative slope
Positive slope
Zero slope
Undefined slope
3. The line of best fit is also known as the line.
4. When drawing a line of best fit, you should try to have an approximately equal number of data points and the line.
5. A researcher collected data on the number of hours students studied for a test and their corresponding test scores. The data is shown in the scatter plot below. Draw a line of best fit for this data.
6. Using your line of best fit from question 5, predict the test score of a student who studied for 7 hours.
7. Describe the correlation shown in the scatter plot from question 5. Is it positive, negative, or no correlation? Explain your reasoning.
8. The line of best fit must pass through the origin (0,0).
True
False
9. A line of best fit is always a perfectly straight line.
True
False
10. Explain the difference between interpolation and extrapolation when using a line of best fit.