Question 109096
a) t is independent because the number of liters depend on how much time has gone by.
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b) 59-38=21
59+21=80g full tank
using 21*2=42g/hr
g=80-42t (t is in hours)
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c) 80-42t=0
-42t=-80
t=-80/-42
=1.905 hrs or 114.29 minutes
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d) the g intercept occurs when t=0
When t=0 g=80 (0,80)
It represents a full tank.
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e) The slope represents the rate at which the tank will empty.
The fact that is negative signifies that with time you will run out of gas.
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This car is a real gas burner.
Ed
{{{graph(500,500,-3,3,-10,90,80-42x)}}}