SAT Subject Test Math Level 2 Practice Test: Functions Definitions

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Question 3 questions

Time 4 minutes

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1. If {(3,2),(4,2),(3,1),(7,1),(2,3)} is to be a function, which one of the following must be removed from the set?

A. (3,2)
B. (4,2)
C. (2,3)
D. (7,1)
E. none of the above

2. For f(x) = 3x2 + 4, g(x) = 2, and h = {(1,1), (2,1), (3,2)},

A. f is the only function
B. h is the only function
C. f and g are the only functions
D. g and h are the only functions
E. f, g, and h are all functions

3. What value(s) must be excluded from the domain of ?

A. -2
B. 0
C. 2
D. 2 and -2
E. no value