Math 1090
Quiz 2
11 January, 2012
Name:
Instructions: Answer the questions below. Make sure to show all work clearly.
1. (6 points) Decide whether each relation is a function. Explain your answer.
(a) input: person
output: date of birth
(b) input: star
output: planet orbiting that star
(c) input: {(0, 1), (1, 3), (−1, 0), (0, 3), (2, 1)}
2. Suppose f (x) = 3x2 −
(a) f (3)
(b) f (k + 2)
12
.
x
Find: