Use a graphing calculator to determine which equation for the line of regression, pearson product-moment correlation value (r), and predicted value match the data in the chart. the chart below shows the number of hours a student spent studying for a math test and the score the student earned on the test. hours spent studying | 0.5|1.25| 1.5 |1.75 |2 | 2.5 |3 |3.5 |4 |

test | 90 | 75| 60 | 83 |75| 80| 99| 97| ? |

a) y = 6.4x + 69.5, r = 0.48
predicted test score for 4 hours of study equals 95.

b) y = 6.1x + 74.5, r = 0.48
predicted test score for 4 hours of study equals 99.

c) y = 5.1x + 74.5, r = 0.88
predicted test score for 4 hours of study equals 95.

d) y = 7.4x + 69.5, r = 0.88
predicted test score for 4 hours of study equals 99.