What is the equation for this graph? Use y=mx+b

Any greatly appreciated! you in advance. 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's 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? a.$65.00b.$5288.00c.$210.00d.$310.00

Write the system of equations represented by the matrix. 0 1 2 4 -2 3 6 9 1 0 1 3

Graph the system: f(x)= 3/x-2; f(x)= 1/2x + 2