16. The following scatter plot graphs the average final grade students received in Introduction to Biology V) versus the number of days they were absent during the semester (x). Also displayed are the best fit line, the equation for that line, and the R2 value corresponding to the data. Just to make sure you understand: the point on the very right, for example, indicates that missing x = 9 days of class resulted in an average grade of y = about 66. 100 90 80 70 60 50 y = -2.8x + 88.7 R² = 0.8976 40 30 20 10 2 4 6 8 10 a) Does this graph show a positive, negative, or zero correlation? How can you tell? b) Is this correlation strong or weak? How can you tell? c) Interpret the y-intercept of the line: 88.7. In words, what does this number represent? Hint: the y-intercept is the value of y when x 0.
16. The following scatter plot graphs the average final grade students received in Introduction to Biology V) versus the number of days they were absent during the semester (x). Also displayed are the best fit line, the equation for that line, and the R2 value corresponding to the data. Just to make sure you understand: the point on the very right, for example, indicates that missing x = 9 days of class resulted in an average grade of y = about 66. 100 90 80 70 60 50 y = -2.8x + 88.7 R² = 0.8976 40 30 20 10 2 4 6 8 10 a) Does this graph show a positive, negative, or zero correlation? How can you tell? b) Is this correlation strong or weak? How can you tell? c) Interpret the y-intercept of the line: 88.7. In words, what does this number represent? Hint: the y-intercept is the value of y when x 0.
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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