Since x=8/3 is a vertical line,the slope is undefined,
The final answer that i got from this was -x-13
If you're simplifying the equation your answer is going to become -d^3 +3d^2 +23d -30
Multiply by 1 minute/60 seconds
the minutes cancel out and youre left with 0.65 kilograms per second
you then multiply by 1000 grams/1 kilogram
the kilograms cancel out and youre left with 650 grams per second