Line of Best Fit Worksheet
Grade 8 Math worksheet covering line of best fit, scatter plots, and correlation.
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Line of Best Fit
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Read each question carefully and follow the instructions to determine the line of best fit and analyze scatter plots.
1. Which type of correlation is shown in a scatter plot where the points generally go up and to the right?
Negative correlation
Positive correlation
No correlation
Constant correlation
2. What is the main purpose of drawing a line of best fit on a scatter plot?
To connect all the data points
To identify outliers
To show the general trend of the data
To calculate the exact average
3. A scatter plot shows the relationship between two .
4. When creating a line of best fit, you want to have an approximately equal number of points and the line.
5. A line of best fit must pass through the origin (0,0).
True
False
6. A strong correlation means the data points are closely clustered around the line of best fit.
True
False
7. The table below shows the number of hours students spent studying for a test and their scores. Plot the data on the graph below and draw a line of best fit.
Study Hours (x) | Test Score (y)
2 | 60
3 | 70
4 | 75
5 | 80
6 | 85
7 | 90
8. Based on your line of best fit, predict the test score of a student who studied for 4.5 hours.
9. Describe the correlation shown in the scatter plot above (from question 7). Is it positive, negative, or no correlation? Explain your reasoning.
10. Explain what an 'outlier' is in the context of a scatter plot and line of best fit.