In Excel:

You collect the following paired data from eight of elementary students: (1.5,77) (2,72) (2.5,88) (2.25,92) (3,90) (3,85) (3.5,97) (4,95). The first variable is hours spent studying for an exam and the second variable is their grade.

(a) Display scatterplot of the paired data.

(b) Describe the relationship between the two variables in terms of form, direction, and strength.

(c) A mistake was found with the grade for the student who spent 2 hours studying. After the correction, the student's grade went up from 72 to 82. Does this correction make the relationship between the two variables stronger or weaker? Explain.