Answer:
It's is a negative one ( -1 )
Step-by-step explanation:
The explanation is in the question, if you draw the line you will see it.
I believe it would be A but i could be way off
The y-intercept is 50 and it tells how many chocolates he starts off with. The slop is -4 because that is how many chocolates he gives out each week. y=-4x+50