1 Which relation is a function?

(1) x = 4               (3) y = sin x
(2) x = y2 + 1       (4) x2 + y2 = 16

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2 In ∆ ABC, m<A = 33, a = 12, and b = 15. What is m<B to the nearest degree?

(1) 41      (3) 44
(2) 43      (4) 48

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5 Every time the pedals go through a 360 rotation on a certain bicycle, the  tires rotate three times. If the tires are 24 inches in diameter, what is the  minimum number of complete rotations of the pedals needed for the bicycle  to travel at least 1 mile?

(1) 12              (3) 561
(2) 281            (4) 5,280

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