Answer:
At the time measurement starts i.e. initially there was no rainfall i.e. y value is zero.
Step-by-step explanation:
y, in terms of time the rain fell, x.
Now, x is measured in hours after 12 : 00 P.M., with x = 0 corresponding to the time 12 : 00 P.M.
Therefore, the ordered pair (x,y) ≡ (0,0) means that at the time measurement starts i.e. at 12 : 00 P. M. there was no rainfall i.e. y value is zero. (Answer)