Karl set out to Alaska in his truck.
The amount of fuel remaining in the truck’s tank (in liters) as a function of distance driven (in kilometers) is graphed.
A first quadrant coordinate plane. The horizontal axis is from zero to nine hundred with a scale of one hundred and is titled Distance in kilometers. The vertical axis is from zero to five hundred fifty with a scale of fifty and is titled Fuel in liters. The graph of the line is y equals negative three-fifths x plus five hundred. The graph ends at each axis.
A first quadrant coordinate plane. The horizontal axis is from zero to nine hundred with a scale of one hundred and is titled Distance in kilometers. The vertical axis is from zero to five hundred fifty with a scale of fifty and is titled Fuel in liters. The graph of the line is y equals negative three-fifths x plus five hundred. The graph ends at each axis.
How much fuel was initially in the tank?
What is a linear function?