You purchase 723 shares of nike at $47.75 per share and one year later you are ready to sell your 723 shares for the current market price of $62.25. did you earn a profit or lose money from this stock sale? how much money did you make or lose? explain how you calculated your answer

The answer to this question is "you gained profit". The amount of money you gain from selling the stocks now is higher compared to the amount you spent a year ago. The amount you gain from the shares is ($62.25) x 723 = $45006.75. The amount you spent last year is ($47.75) x 723 = $34523.25. The difference between the values is $10483.47. Thus, you gained $10483.47. 

I'm pretty sure it's b). i try drawing the functions out and b is the one that stands out or isnt a "line"

I'm gonna have to say about 13 percent