A real-world situation that can be modeled with a two-variable linear equation is the relationship between the amount of money a person earns and the number of hours they work. For example, if a person earns $10 per hour, we can represent their earnings as a function of the number of hours they work with the equation y = 10x, where y is the person's earnings in dollars and x is the number of hours they work.

In this example, the y-intercept of the line would represent the minimum amount of money the person earns, regardless of the number of hours they work. The x-intercept of the line would represent the number of hours the person would have to work to earn exactly $0. The slope of the line represents the rate of change of the person's earnings as the number of hours they work increases by one. In this case, the slope is 10, which means that for every hour the person works, their earnings increase by $10.
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