Can someone answer this for me just tell me what to pick

The inequality you require is

The number of bottles left at the end of each day is  48 - 3x. So it is:-

48 - 3x < 10

Solving the inequality to find the last part of question:-

-3x < 10 - 48

-3x < -38

x >  38/3 = 12 2/3

So answer is  13 days.

the answer is d

the answer is in the first quadrant, which make the y-int positive.

since the dots are going down, therefore the correlation is negative

i hope it is right.