Use the following information to answer questions 15 to 19

The following indicates the number of hours that Johnny spent studying the week before each exam in his classes along with the corresponding exam scores:

Hours Studying:

3, 7, 9, 11, 15, 18

Score on Exam:

53, 48, 59, 71, 80, 93

15) Identify the explanatory and response variables for this situation

16) Find the LSRL for this data

17) Find and interpret the correlation coefficient

18) Find and interpret the coefficient of determination

19) Find the residual corresponding to the explanatory value of 9