### The solution gives detailed steps on setting a linear equation using the example of saving plan. All the formula and calcuations are shown and explained. An excel output is also included.

Sophie has been saving money at a regular rate and noticed that x months after her 15th birthday, she had saved a total of 20x + 244 dollars. Which of the following statements correctly describes her savings plan? How did you get that answer? A) By her 15th birthday, she had saved 20 dollars and was able to save an additiona