Final answer:
The question is about forming a system of linear equations to compare costs of renting a car from two different agencies based on days and miles. It involves analyzing the slope and y-intercept of each equation to determine the total rental cost.
Step-by-step explanation:
The question involves forming a system of linear equations to compare the total cost of renting a car from two different agencies based on the number of days (x) and miles driven (y). For the first agency, the cost is represented by the equation 15x + 0.11y, and for the second agency by 18x + 0.08y. These equations allow for comparing costs and making a decision based on the total rental cost from each agency.
To analyze these equations, one typically looks at the slope and the y-intercept. The slope represents the rate of change in cost depending on the number of miles driven, and the y-intercept represents the flat daily rental rate. For example, in solution 12.4, the linear equation y = 25 + 15x represents the earnings of Svetlana from tutoring, where the slope is 15 and the y-intercept is 25.