Line of Best Fit Worksheet
This worksheet focuses on understanding and calculating the line of best fit for scatter plots, including correlation and making predictions.
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Line of Best Fit Worksheet
Name:
Date:
Score:
Read each question carefully and follow the instructions. Show all your work for calculations.
1. Which of the following describes a strong positive correlation?
Points are scattered randomly.
Points are close to a line sloping upwards to the right.
Points are close to a line sloping downwards to the right.
Points form a horizontal line.
2. The line of best fit is also known as the:
Median line
Regression line
Average line
Trend line
1. A line of best fit always passes through the origin (0,0).
True
False
2. Extrapolation is generally more reliable than interpolation when making predictions using a line of best fit.
True
False
1. The is a measure of the strength and direction of a linear relationship between two variables.
2. When drawing a line of best fit, you try to have an equal number of points and the line.
1. Describe the difference between interpolation and extrapolation when using a line of best fit.
The following data shows the number of hours studied for a test and the corresponding test score:
Hours Studied (x): [2, 3, 5, 6, 7]
Test Score (y): [60, 65, 75, 80, 85]
1. Plot the data on the graph below and draw a line of best fit.
2. Based on your line of best fit, predict the test score for a student who studied for 4 hours.
3. Based on your line of best fit, predict the test score for a student who studied for 9 hours. Is this an example of interpolation or extrapolation?
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