Final answer:
The student's question uses a linear equation to estimate the number of citizens with a driver's license from 2013 to 2022 by plugging in the number of years after 2013 into the equation, which shows a consistent yearly increase in the number of licensed drivers.
Step-by-step explanation:
The question revolves around a linear equation y=2.6x+212.6 which estimates the number of citizens in millions who carry a driver's license in a certain country from 2013 to 2022.
To determine the number of citizens carrying a driver's license at any given year after 2013, you would substitute the number of years after 2013 for x in the given equation. For example, to find the estimate for the year 2022, you would calculate y=2.6(2022-2013)+212.6. This linear equation indicates that each year there is a consistent increase in the number of citizens with driver's licenses, with a slope of 2.6 representing this change per year.