Which set of ordered pairs below is a function? 1.) {(3 , 3), (6 , 1), (2 , 3)} 2.) {(4 , 7), (2 , 8), (4 , 2)} 3.) {(9 , 6), (3 , 1), (7 , 3)} i have been on this problem for awhile now and still can't figure it out.

Can someone me with this problem i don't understand i need

The graph below shows the height of a projectile t seconds after it is launched. if acceleration due to gravity is -16 ft/s2, which equation models the height of the projectile correctly?

Amajor grocery store chain is trying to cut down on waste. currently, they get peaches from two different distributors, whole fruits and green grocer. out of a two large shipments, the manager randomly selects items from both suppliers and counts the number of items that are not sell-able due to bruising, disease or other problems. she then makes a confidence interval. is there a significant difference in the quality of the peaches between the two distributors? 95% ci for pw-pg: (0.064, 0.156)