Rowan has $50 in a savings jar and is putting in $5 every week. Jonah has $10 in his own jar and is putting in $15 every week. Each of them plots his progress on a graph with time on the horizontal axis and amount in the jar on the vertical axis. Which statement about their graphs is true?

Jonah’s graph always lies above Rowan’s.

Jonah’s graph has a steeper slope than Rowan’s.

Rowan’s graph always lies above Jonah’s.

Rowan’s graph has a steeper slope than Jonah’s