Solve the problem.Ten students in a graduate program were randomly selected. Their grade point averages (GPAs) when they entered the program were between 3.5 and 4.0. The following data were obtained regarding their GPAs on entering the program versus their current GPAs. Find the equation of the least-squares regression line that models the data. Entering GPA Current GPA 3.5 3.6 3.8 3.7 3.6 3.9 3.6 3.6 3.5 3.9 3.9 3.8 4.0 3.7 3.9 3.9 3.5 3.8 3.7 4.0
A. y ? 2.51 + 0.329x
B. y ? 3.67 + 0.0313x
C. y ? 5.81 + 0.497x
D. y ? 4.91 + 0.0212x
Answer: B
Mathematics
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arctan (3y + 3)
B. x = 2 arctan 
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D. x = 
arctan 
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A. {6} B. {8} C. {9} D. {11}
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Decide whether the relation defines a function.y = x3
A. Function B. Not a function
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Find the x- and y-intercepts of f.f(x) = 3x - x3
A. x-intercepts: 0, 
, -
; y-intercept: 3
B. x-intercepts: 0, 
, -
; y-intercept: 0
C. x-intercepts: 0, -3; y-intercept: 0
D. x-intercepts: 0, -3; y-intercept: 3
Mathematics