To determine how much taller the tallest flower is than the shortest flower, we need to identify the heights depicted on the line plot.
From the values you have provided, it seems the heights of the flowers range from 6 inches to 8.5 inches (as inferred from the increments shown).
- Tallest flower height: 8.5 inches
- Shortest flower height: 6 inches
Now, we subtract the height of the shortest flower from the height of the tallest flower:
\[ 8.5 , \text{inches} - 6 , \text{inches} = 2.5 , \text{inches} \]
Thus, the tallest flower is 2.5 inches taller than the shortest flower.
None of the options you provided match this value, but the closest option seems to be 2 1/2 inches, which is the same as 2.5 inches.
So, the answer is 2 1/2 inches.