Lydia is playing Galaxy 8RX. After three misses, the game is over. Last week, Lydia kept track of how long her games lasted. Hse msde a line plot of her data. Lydia said,"My best time is 2 3/4 minutes longer than my worst time because 4 1/4-1 1/2=2 3/4.
Is subtraction the correct operation to compare Lydia's best and worst times?Explain.

Are Lydia's calculations accurate?Show how you know.

In the line plot, what do the numbers Lydia subtracted represent?

Does Lydia's conclusion make sense? How did you decide? If not, what can you do to improve her reasoning?