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Georges asked five of his friends how long they studied for the last math test and what grade they received. He fo equation for the data to be y = 9.6x + 65.8. What does the 65.8 mean in the context of this equation?

Georges asked five of his friends how long they studied for the last math test and what grade they received. He fo equation for the data to be y = 9.6x + 65.8. What does the 65.8 mean in the context of this equation?

Advanced Engineering Mathematics
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Georges asked five of his friends how long they studied for the last math test and what grade they received. He found a linear regression x equation for the data to be y = 9.6x + 65.8. What does the 65.8 mean in the context of this equation? x 1x √x √x A If they studied 0 hours they would earn a 65.8. B C D For every hour they studied their grade would go up 65.8 points. The lowest grade they could receive on the test was a 65.8. The lowest grade of his five friends was a 65.8.
Transcribed Image Text:Georges asked five of his friends how long they studied for the last math test and what grade they received. He found a linear regression x equation for the data to be y = 9.6x + 65.8. What does the 65.8 mean in the context of this equation? x 1x √x √x A If they studied 0 hours they would earn a 65.8. B C D For every hour they studied their grade would go up 65.8 points. The lowest grade they could receive on the test was a 65.8. The lowest grade of his five friends was a 65.8.
x x x A B C D -0.70 0.30 A college professor inputs test scores for the first two tests of the semester to determine the correlation. The scatterplot for the test scores is shown, along with the line of best fit. Choose the BEST estimate for r, the correlation coefficient. 1.0 0.70 90- E -0.30 40- 30- 20- 10- 0- 10 20 30 40 50 60 70 80 90 100 Test 1
Transcribed Image Text:x x x A B C D -0.70 0.30 A college professor inputs test scores for the first two tests of the semester to determine the correlation. The scatterplot for the test scores is shown, along with the line of best fit. Choose the BEST estimate for r, the correlation coefficient. 1.0 0.70 90- E -0.30 40- 30- 20- 10- 0- 10 20 30 40 50 60 70 80 90 100 Test 1
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