4th grade math help! Line plots

Answer:
There are three 'x's on the 3/4 spot, so you know that there are three 3/4 inch buttons.
To find how long they are lined up, you add them.
3/4 + 3/4 + 3/4 = 9/4
9/4 as a mixed number is 2 1/4.
Good luck!
Step-by-step explanation: