Hours Spent Studying	Total Points Earned
22	12
20	18
29	25
24	25
43	28
46	29
39	35
40	39
51	40
43	43
39	43
51	49
52	50
65	51
57	53
56	53
52	55
66	55
63	57
68	57
67	59
42	59
65	59
69	60
72	60
66	61
53	61
45	61
58	62
81	62
60	62
57	62
77	62
78	63
67	64
78	64
72	64
58	64
71	65
76	65
79	66
83	66
65	66
72	66
71	66
52	67
78	67
70	67
81	67
80	68
79	68
72	68
75	68
91	68
65	68
84	69
77	69
78	70
72	70
84	70
83	70
67	70
80	71
78	71
72	72
70	72
94	72
92	72
84	73
98	73
78	73
78	73
84	73
74	74
90	74
83	74
84	74
83	75
78	75
93	75
80	75
101	76
81	76
83	76
91	76
83	76
93	76
78	76
78	77
65	77
84	77
97	77
88	77
93	78
93	78
95	78
95	79
91	79
95	79
94	79
95	80
102	80
105	80
83	80
99	80
97	81
79	81
101	81
88	82
93	83
95	85
94	85
104	85
88	85
80	86
98	86
83	86
91	86
90	87
83	87
92	88
88	88
99	89
101	90
101	90
99	90
102	90
84	90
110	91
93	91
105	91
109	91
91	92
104	92
95	92
98	92
91	93
104	93
104	94
106	95
95	95
106	95
92	95
101	96
95	96
109	96
95	96
101	96
105	97
104	97
104	97
105	98
95	99
109	100
110	100
101	100

Develop a scatter plot for these data. What does the scatter plot indicate about the relationship between total points earned and hours spent studying?

Develop an estimated regression equation showing how total points earned is related to hours spent studying. The estimated regression model is: Y_i^predicted = + * X_i. Round your answers to two decimals.

Mark Sweeney spent 92 hours studying. Use the regression model you estimated in part (b) to predict the total points Mark earned. Use the unrounded values in your calculations. Round answers to two decimals.

Mark Sweeney wants to receive a letter grade of A for this course, and he needs to earn at least 91 points to do so. Based on the regression equation developed in part (b), how many estimated hours should Mark study to receive a letter grade of A for this course? Use the unrounded values in your calculations. Round answers to two decimals.