Number of Social Media Posts vs. GPA
4.0
3.5
3.0
G
P
2.5
А
2.0
1.5
1.0
0
50
100
150
200
250
300
350
400
Social Media Posts
Brent is trying to figure out the relationship between the number of times his friends post on social media and their grade point
averages. He records the collected data on a scatter plot. Which of the linear functions best models the line of best fit? What does the
slope in the equation represent?
A)
y = 0.004x - 4; the average number of posts per friend
B)
y=-0.5x - 4; the amount of decrease in the GPA for each post
C)
y = 0.05x - 4; the amount of increase in the GPA for each post
D)
y = -0.004x + 4; the amount of decrease in the GPA for each post