Which of the following is an example of a function?

{(3, 4), (4, 8), (6, 6), (7, 10)}

{(0, 2), (1, -4), (1, -3), (3, 6)}

{(-1, 4), (0, 3), (0, -2)}

{(5, 7), (6, 8), (6, 9), (7, 10)}

which expression can be used to convert 80 us dollars (usd) to australian dollars (aud)?

1 usd = 1.0343 aud

1 aud = 0.9668 usd

step-by-step explanation:

sorry just need the points

table 3 represents a direct variation function. : )