DATA ANALYSIS: AVERAGE SCORES An instructor gives regular 20-point quizzes and 100-point
Chapter 2, Problem 136(choose chapter or problem)
DATA ANALYSIS: AVERAGE SCORES An instructor gives regular 20-point quizzes and 100-point exams in an algebra course. Average scores for six students, given as data points where is the average quiz score and is the average test score, are and [Note: There are many correct answers for parts (b)(d).] (a) Sketch a scatter plot of the data. (b) Use a straightedge to sketch the line that you think best fits the data. (c) Find an equation for the line you sketched in part (b). (d) Use the equation in part (c) to estimate the average test score for a person with an average quiz score of 17. (e) The instructor adds 4 points to the average test score of each student in the class. Describe the changes in the positions of the plotted points and the change in the equation of the line.
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