Answer:
Data set 1
Step-by-step explanation:
Because for every x there is only one y
First and third, second can still be simplified.
There are 24 hours in one day. when you count from 1-24, (1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24) the number 7 shows up twice
