# Linear relationships: Worked example (refuelling a tank)

- Author:
- Eric Coonan

Rose Bay Secondary College
9Mat1
Linear relationships
This GeoGebra file follows the worked example of the 2 lessons at the start of the topic 'Linear relationships'. A brief description of that example follows: A petrol tank initially has 10 litres (which would vary on the next occasion that the tank is refilled). The tank is refilled at a rate of m litres/second. Use the linear relationship formulae y = mx + b to find how long it would take to fill the tank up.
Mr E Coonan, Prac Teacher

Vary the sliders m and b to determine the effect of the perpendicular line to the x axis (being the time required to fill the tank).