Which set of ordered pairs (x, y) could represent a linear function? A = {(-4,-4), (-2,0), (0,3), (2,6)}
B = {(-3,-6), (0, -3), (4,0), (7,3)}
C = {(-3,8), (0,5), (2, 2), (5, -1)}
D = {(2,8), (4,4), (5,2), (6,0)}

Jody bought 20 shares of amazon at the close price of $121.00. she bought 20 more shares a year later at the price of $127.00. two years later, she sold all of her shares at the price of $133.00. her broker charges $50 for each transaction. after all of these transactions, how much money did jody make?