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 = 55.8 + 2.79x
C. y = -26.4 - 1.42x
D. y = 26.4 + 1.42x
Answer: B
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Sketch the graph and show all local extrema and inflection points.y = -x4 + 4x2 - 5
A. Local minima: (-
, 1), (
, 1)
Local maximum: (0, 5)
Inflection point: 
, 
B. Local maxima: (-
, -1), (
, -1)
Inflection points: 
, 
C. Local maxima: (-
, -1), (
, -1)
Local minimum: (0, -5)
No inflection points
D. Local maxima: (-
, -1), (
, -1)
Local minimum: (0, -5)
Inflection points: 
, 
Solve the problem.
=
A. 50 B. 1 C. 51 D. 39 E. none of these
The given point lies on the graph of the unit circle and corresponds to a real number t. Find the value of the indicated trigonometric function of t.
Find sin t.
A. - 
B. - 
C. - 
D. 
Solve the problem.The following table shows the number of species listed as threatened or endangered in selected countries. Which country has 5 times as many species listed as Country B, which lists 130 species? 
A. Country D B. Country A C. Country C D. There is not enough information given.