Rex's puppy is 5 years younger than his other dog. if the other dog is x years old, what is an expression for the puppy's age?

Amanda went into the grocery business starting with five stores. after one year, she opened two more stores. after two years, she opened two more stores than the previous year. if amanda expands her grocery business following the same pattern, which of the following graphs represents the number of stores she will own over time?