Answer is C. y=1/3x+3
the slope is going to be 1/3 (opposite of -3/1) and if go to the point 3,4 and go down one and left 3, you will get a y intercept as 3
You have the slope and you have two points, so you can use the slope equation to find x.

So your answer is x = 8.
I don’t think this will help exactly but I hope it does x
a) 0-32000
1-30000
2-28000
3-26000
4-24000
b)y=-2000x+32000
c) 16 min