Car sales were 40% higher nationwide in December 2013 than in December 2005. A team of economists who track car sales want to know the annual rate of increase, assuming that December sales increased at the same rate each year. Which option describes how the team can begin to find the approximate annual rate of increase?

There is. For every new 50 employees, the number of products increases by 1000. Because the rate stays steady, there is a correlation that can be drawn using a function.

y = 20x + 100

The slope indicates for each new employee, 20 more products will be made annually. The y-intercepts tells us that if there are no employees, only 100 products will be made.