Questions c and d at the bottom I do not understand

1 X B C D E F G H J K L M N A Which Drill 5 X- X Drilling Feet, y X - X Vi - y Begins, * lin X. - X VI - V ( x, - x ) ( V. - J ) 2 S S. I S. [in feet) mnutes) 35 5.88 91 2500 -1 1058 8,326.56 1 2229 -1 7471 -14163 2 4745 Drilling Time versu 50 5.99 -76.2500 -0.9958 5,814 06 0.9917 -1 4599 -1 2754 1 8621 9.00 75 6.74 -51.2500 -0.2458 2,626.56 0.0604 -0.9813 -0.3149 0.3090 95 6.10 -31.2500 0.8858 976.56 0.7847 0.5983 -1 1346 0.6788 800 120 7.47 6.2500 0.4842 39.06 0.2344 -0.1197 0.6201 0.0742 7.00 130 6.93 3.7500 0.0558 14.06 0.0031 0.0718 0.0715 0.0051 145 6.42 18.7500 500 0.9842 351 56 0.3202 0.3590 -0.7247 0.2602 155 7.97 28.7500 0.9342 826 56 0.9686 0.5505 1 2605 0.6939 5.00 160 7.92 Time (minutes) 33.7500 0.6342 1,139.06 0.8727 0.6462 1.1965 0.7731 400 175 7.62 48.7500 -0.0958 2,376.56 0.4022 0.9334 0.8122 0.7581 185 6.89 58.7500 0.0958 3,451 56 0.0092 1 1249 0.1227 0.1381 13.00 190 7.90 63.7500 0.9142 4,064.63 0.8357 1 2206 1 1708 1.4291 2.00 = 30,006.25 2= 6.7057 E= 8 5010 1.00 ProgrammePre-prgrammed Programmed re-prgrammed by You in Excel by You in Excel 20 40 80 100 X = 126,2500 126 2500 n-1= -1 Depth (Inch -1 V = 6.9858 6 9858 S = 52.2300 52.2300 S. = 0.7808 0.7808 (c) Determine whether a linear relation exists between time to drill five feet and depth at which drilling begins. (d) The Simple Regression Model [refer to Module 3 Lab Instructions). Make sure you answer all questions in part (d)