Solve the problem.A study was conducted to compare the average time spent in the lab each week versus course grade for computer students. The results are recorded in the table below. Find the equation of the least-squares regression line that models the data. Number of hours spent in lab Grade (percent) 10 96 11 51 16 62 9 58 7 89 15 81 16 46 10 51
A. y ? 0.930 + 44.3x
B. y ? 1.86 + 88.6x
C. y ? 44.3 + 0.930x
D. y ? 88.6 - 1.86x
Answer: D
Mathematics
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A. 5?
B. 
?
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A. 
B. 
C. 
D. 
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Solve the problem.From a point on a river, two boats are driven in opposite directions, one at 6 miles per hour and the other at 7 miles per hour. In how many hours will they be 39 miles apart?
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Use the given information to find the exact value of the trigonometric expression.tan ? = 
; The terminal side of ? lies in Quadrant III.
Find sin 2?.
A. - 
B. - 
C. 
D. 
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