Take the real-life situation and create an equation or inequality that could be used for analysis, prediction, or decision making. Then, draw a graph to depict the variables in your situation. Use your graph and what you know about linear inequalities to discuss the significance of your findings.
For example the gasoline mileage is constant and the variables are the miles it goes and the gasoline left.
y = the amount of miles on your car,
x = years
y = 10,000
This solution provides a detailed explanation of the given word problem.