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6. Which of the functions corresponds to the graph? 6. 4 - 2 5 x -1 2 -2 -3+ -4 A. f(x) = 2 cos x + 1 B. f (x) = sin(2x) + 1 C. f(x) =-cos x + 2 D. f (x) = 2 sin x + 1 SHORT ANSWER: 7. Points (2, - 5) and (0, - 1) are endpoints of the diameter of a circle. (a) What is the exact length of the diameter? (Simplify as much as possible) Answer: (b) What is the center of the circle? Answer: (c) What is the equation of the circle? Answer: 8. Find the value of the logarithm: logz (16) Answer: 9. Ellen, a resident of Metropolis, pays Metropolis an annual tax of $65 plus 2.7% of her annual income. If Ellen paid $2,279 in tax, what was Ellen's income? Answer: Page 3 of 7