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Best Fit Lines Lab

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NAME: _____________________
Algebra II Lab
Best Fit Lines
The data in the table below represent the number of people in an elevator
and the additional weight that can be safely added.
1. Identify the independent and dependent variables.
Number
of People
Additional
Weight
(lbs)
2
4
5
7
7
10
12
12
15
2200
1900
1650
1170
1250
920
600
550
100
2. Graph the data.
3. Describe the correlation of the data.
4. Draw the line of best fit, through 2 of the given data points.
5. Estimate the correlation coefficient r.
6. Which points did you draw your line through?
( ________, ________ ) and ( ________, ________)
7. Calculate the slope of your line. Round to the closest tenth.
8. Calculate the y-intercept of your line.
9. Write the equation of your line in slope-intercept form.
10. If there are 11 people on the elevator how many 150 pound refrigerators
would be safe to add on?