Rowan has 50$ in a saving jar and is putting in 5$ every week. Jonah has 10$ in his own jar is putting 15$ very week. Each of them plots his progress on a graph with time on horizontal axis and amount in the jar on the. Vertical axis. Which statement about their graph is true.
(A) Rowan's graph has a steeper slope than Johan's
(B) Rowan's graph always lies above Johan's
(C) Johan graph had a steeper slope than rowan
(D) Johan graph always lies above rowan