MATH 115 Precalculus Summer, 2017, V3.1 6. Which of the functions corresponds to the graph? 6. 5 4 3 1 . + + 5 5 -1+ -2+ -3+ A. f (x) = 2 + cos x B. f(x) = 3- cos x C. f (x) = 2(1 - cos x) D. f (x) = 2 - sin x SHORT ANSWER: 7. Points (7, 2) and (3, 8) 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: logs (36) Answer. 9. Al, a resident of Metropolis, pays Metropolis an annual tax of $65 plus 1.4% of his annual income. If Al paid $863 in tax, what was Al's income? Answer: Page 3 of 7