find the equation of the line in terms of v and t

a tank which holds 100 litres of water has a leak.

after 150 minutes, there is no water left in the tank.
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1 Answer

Volume, v=100, at time t=0; v=0 at time t=150. Let v=a+bt. Therefore, a=100 when t=0; 0=100+150b when t=150, so b=-100/150=-2/3. So v=100-2t/3, the equation of a line.

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