Obtaining thevslope you get 6/5. so
9=-24/5 +n
=
y=6/5x + 21/5
.....................................
400/160=2.5 This is finding the necessary multiplier
2.5*5=x I used 2.5 and multiplied it by 5
x=12.5 minutes This is the answer
It would take 12 minutes and 30 seconds
Answer
4^ 18
i hope this is what your looking for