Write the Word or Phrase That Best Completes Each Statement

Essay

Write the word or phrase that best completes each statement or answers the question.
-A calculus instructor is interested in finding the strength of a relationship between the final exam grades of students enrolled in Calculus I and Calculus II at his college. The data (in percentages) are listed below.
$\begin{array}{l|c|c|c|c|c|c|c|c|c|}\text { Calculus I } & 88 & 78 & 62 & 75 & 95 & 91 & 83 & 86 & 98 \\\hline \text { Calculus II } & 81 & 80 & 55 & 78 & 90 & 90 & 81 & 80 & 100\end{array}$

a) Graph a scatter diagram of the data.
b) Find an equation of the regression line.
c) Predict a Calculus II exam score for a student who receives an 80 in Calculus I.