Find the equation of the least squares line.The paired data below consist of the costs of advertising (in thousands of dollars) and the number of products sold (in thousands). 
A. y = 55.8 - 2.79x
B. y = -26.4 - 1.42x
C. y = 55.8 + 2.79x
D. y = 26.4 + 1.42x
Answer: C
Mathematics
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Graph the ellipse and locate the foci.4x2 + 9y2 = 36
A. foci at (0, 
) and (0, -
)
B. foci at (
, 0) and (-
, 0)
C. foci at (
, 0) and (-
, 0)
D. foci at (2
, 0) and (-2
, 0)
Mathematics
Solve the system of equations using substitution.
A. x = -8, y = -5 or (-8, -5) B. x = 8, y = -5 or (8, -5) C. x = -8, y = 5 or (-8, 5) D. x = 8, y = 5 or (8, 5)
Mathematics
Perform the indicated operations. Write the resulting polynomial in standard form.(x - 7)(x2 + 7x + 49)
A. x2 - 343 B. x3 - 7x - 343 C. x3 - 343 D. x2 + 49x - 343
Mathematics
Use l'Hospital's rule, if applicable, to find the limit.
A. 0
B. 
C. 2
D. Does not exist
Mathematics