Question

Which choice shows a function with a domain of {-4, -2, 2, 4)?

A (graph shows a straight line through the x- axis on 2)
B (diagonal line)
C{(-4, 2), (-2, 1), (2, 0), (4, 5)}
D{(1,-4), (0, -2), (2, 2), (6,4)}

Answer 1

Answer: C(-4,2), (-2,1), (2,0), (4,5)

Answer 2

C {(-4, 2), (-2, 1), (2, 0), (4, 5)}

Explanation:

The domain is the set of x-values for which the function is defined.

Choices

A) The relation is only defined for x=2. It is not a function, because x=2 maps to an infinite number of y-values.

B) The domain is an infinite number of x-values. The listed values are included in the domain, but they are not the entire domain.

C) The list of first-values in the ordered pairs is the domain of the function it matches the given domain.

D) The list of first-values in the ordered pairs is not the same as the given domain.