Describe the strength and direction of the linear correlation.Each of several people of various ages was asked to choose his or her favorite number (1-100). Their ages and numbers are recorded in the following table:
A. Little or no linear correlation
B. Weak negative linear correlation
C. Strong positive linear correlation
D. Strong negative linear correlation
Answer: A
Mathematics
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A. (4, ?)
B. (-?, 4)
C. (-?, 4]
D. [4, ?)
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A. 9x3 - 54x2 + 9x + 1 B. 9x3 - 55x2 + 15x - 1 C. 9x3 + 55x2 - 15x + 1 D. 9x3 - 53x2 + 3x - 1
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Solve the system by elimination.x2 + y2 = 4x2 - y2 = 4
A. (2, 0), (2, 2) B. (2, 2), (-2, 2) C. (2, 0), (-2, 0) D. (-2, 0), (-2, 2)
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Decide whether A and B are inverses by calculating AB and BA.A = 
B = 
A. Yes B. No
Mathematics