The linear function that best models the line of best fit is D. y = 0.05x + 4; the amount of increase in CGPA for each post.
What is the line of best fit?
The line of best fit suggests a linear relationship between the number of posts and the CGPA. For every additional post, there is a small increase in the expected CGPA.
In the above equation, y represents the dependent variable, which in this case is the CGPA. x represents the independent variable, which is the number of posts. and 0.05 is the slope of the line. It tells us how much the CGPA increases (y) for each additional post (x).
4 is the y-intercept of the line. It tells us the value of y when x is 0. In this case, when there are no posts (x = 0), the expected CGPA is 4.