Using the accompanying Student Grades data, construct a scatter chart for midterm versus final exam grades and add a linear trendline. What is the model? If a student scores 7878 on the midterm, what would you predict her grade on the final exam to be?

What is the model for the trendline?
Final Exam Grade= ?+?×Midterm Grade
If a student scores 78 on the midterm, her predicted final exam grade would be?
From the given data, scatter plot of midterm grades vs final term grades is as follows
From the above scatter plot, regression model obtained is simple regression model as there is only one regressor. Model for trendline is y = 0.5973x + 33.51 i.e. Final grades = 0.5973x(Midterm grades) + 33.51.
Now, we have to predict final exam grades, if student scores 7878 on the midterm 
Hence, from the above equation 
Final grades = 0.5973x(Midterm grades) + 33.51
= 0.5973*7878 + 33.51
= 4739.039
4739.039 will be the final score if student scored 7878 at midterm.
If student scores 78 on the mid term then final score will be 
Final grades = 0.5973x(Midterm grades) + 33.51
= 0.5973*78 + 33.51
= 80.0994
80.0994 will be the final score if student scored 78 at midterm.
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