Find a linear model for the following data table. Round your answer to two decimal places, if necessary.
x 3 4 5 6 y 16 12 8 4?
A. ?
B. ?
C. ?
D. ?
Answer: D
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Using the graph below, find the domain and range of the given function, and sketch the graph. 
y = -f(x)
A. D: [-7, 2]; R: [-4, 2]
B. D: [-5, 4]; R: [-3, 3]
C. D: [-7.5, 1]; R: [-1, 5]
D. D: [-4, 5]; R: [-3, 3]
Use partial fractions to find the sum of the series.
A. 
B. 
C. 
D. 
Solve the problem.
The graph of y = f(x) represents the amount of oil in millions of gallons remaining in a tank after x days. (i) Approximate f(3) and f(5). (ii) At what rate was oil being drained from the tank when 
A. f(3) ? 32.5, f(5) ? 25; about 15 million gallons per day B. f(3) ? 42.5, f(5) ? 17.5; about 3.75 million gallons per day C. f(3) ? 37.5, f(5) ? 27.5; about 7.5 million gallons per day D. f(3) ? 35, f(5) ? 27.5; about 12.5 million gallons per day
Find the center and the radius of the circle.x2 + y2 - 4x = -12y - 36
A. (2, -6); r = 3 B. (3, -7); r = 2 C. (2, -6); r = 2 D. (5, -6); r =2