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What does the intercept mean in this context?

What does the intercept mean in this context?

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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QUESTION 27 The following regressiong model describes the relation between between the number of study hours spent by students to prepare for an exam and their scores y = - 15+4.5x What does the intercept mean in this context? O A student who did not prepare at all for the exam is expected to get a grade of - 15. O For each additional hour sperit to prepare for the exam, the grade is expected to decrease by 15. O For each additional hour spent to prepare for the exam, the grade is expected to increase by 4.5. O The intercept has no meaning in this context.
Transcribed Image Text:QUESTION 27 The following regressiong model describes the relation between between the number of study hours spent by students to prepare for an exam and their scores y = - 15+4.5x What does the intercept mean in this context? O A student who did not prepare at all for the exam is expected to get a grade of - 15. O For each additional hour sperit to prepare for the exam, the grade is expected to decrease by 15. O For each additional hour spent to prepare for the exam, the grade is expected to increase by 4.5. O The intercept has no meaning in this context.
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