Which relation is a function? (A) {(4, 2), (3, 3), (2, 4), (3, 2)}
(B){(1, 4), (2, 3), (3, 2), (4, 1)}
(C){(1, 2), (2, 3), (3, 2), (2, 1)}
(D){(1, −1), (−2, 2), (−1, 2), (1, −2)}

The table shows the distance traveled over time while traveling at a constant speed.

International calls require the use of a country code. many country codes a 3-digit numbers. country codes do not begin with a 0 or 1. there are no restrictions on the second and third digits. how many different 3-digit country codes are possible?

The weights of players in a basketball league are distributed normally. the distance (d) of each player's weight (w) from the mean of 86 kilograms was computed as follows: d = |w - 86| if d is greater than 7 for approximately 5% of the players, what is the approximate standard deviation of the players' weights? a. 1.75 kilograms b. 3.5 kilograms c. 4.3 kilograms d. 7 kilograms