A graph shows time (weeks) on the horizontal axis and Amy's gas mileage (M P G) on the vertical axis. Both axes are unnumbered. An orange line begins in the middle of the vertical axis and increases, stays constant, then decreases. Amy and Laura recorded the average gas mileage (MPG) of their vehicles each week for four weeks. What can be concluded about the relationships shown in the graph and table?

Amy and Laura recorded the same gas mileage each week.
Both Amy and Laura increased their gas mileage in the first two weeks.
Amy had greater gas mileage than Laura.
Laura had a constant gas mileage in the first four weeks of data.