Homework Help: Rocket fuel consumption too easy?

1. Nov 12, 2008

shutoutsteve

1. The problem statement, all variables and given/known data
Rocket with fuel mass of m(initial)
Rocket without fuel is m(final)
Time for fuel to be used up is t(final)

2. Relevant equations
What is m(t) (slope of m vs t graph)
(i assume t(initial) is zero

3. The attempt at a solution

[((m(final) -m(initial)) / t(final)]t + m(initial) for interval 0<t<tf

just mx+b?

2. Nov 12, 2008

asleight

That's true if mass is lost at a constant rate.

3. Nov 12, 2008

shutoutsteve

Yes, that was given too.
Our other assignment page is covered in derivatives and integrals, but my answer for this one was simple math, so I was worried I had it wrong. :)