Can anyone help with Lines and Linear Equations?Quicky

If the graphs of the linear equations in a system are parallel, what does that mean about the possible solution(s) of the system? a. there are infinitely many solutions. b. there is no solution. c. there is exactly one solution. d. the lines in a system cannot be parallel.

If i have 20$ and i gave 5$ away how much i got

Which of the functions below could have created this graph?