Determine which relation is a function.

a.
{(–3, 2), (–2, 3), (–1, 2), (0, 4), (1, 1)}

b.
{(–3, 2), (–1, 3), (–1, 2), (0, 4), (1, 1)}

c.
{(–3, 2), (–2, 3), (–1, 1), (0, 4), (0, 1)}

d.
{(–3, 3), (–2, 3), (–1, 1), (0, 4), (0, 1)}

Solve 2x2 + 8 = 0 by graphing the related function. there are two solutions: . there are no real number solutions. there are two solutions: 2 and -2

According to the 2008 u.s. census, california had a population of approximately 4 × 10^7 people and florida had a population of approximately 2 × 10^7 people. which of the following is true? a. the population of florida was approximately two times the population of california. b. the population of florida was approximately twenty times the population of california. c. the population of california was approximately twenty times the population of florida. d. the population of california was approximately two times the population of florida.

The volume of gas a balloon can hold varies directly as the cube of its radius. imagine a balloon with a radius of 3 inches can hold 81 cubic inches of gas. how many cubic inches of gas must be released to reduce the radius down to 2 inches?