Answer:
Graph A - 4 1/2 feet
Step-by-step explanation:
Since Mario is taller that his younger brother - add the two heights together.
2 3/4 + 1 3/4 =
I added the whole numbers first 2 + 1 = 3; then the fractions 3/4 + 3/4 = 1 1/2
Add 3 + 1 1/2 = 4 1/2