Math
posted by Carrie .
Write a brief scenario that can modeled with a linear equation. AND
Summarize a situation modeled by a quadratic equation.
I am completly lost with these two questions. I understand the difference between these two functins but don't know how to come up with a scenario or a situation.

auto range vs gasoline in the tank. Linear
postion of a baseball just hit off the bat: quadratic 
Ok. Can you explain how this is so? Just so I know and understand.