The following is data for the first and second Quiz scores for 8 students in a class.

First Quiz	Second Quiz
10	12
23	24
31	27
33	28
35	35
42	39
45	41
50	47

Plot the points in the grid below.

Predict the value of the second quiz score if a student had a score of $\displaystyle {21}$ on the first test. Preview Question 6 Part 2 of 2