Answer:
a tomato plant that is 45 days old will be 26 inches tall.
Explanation:
If f(x) is the height, in inches, of a tomato plant that is x days old, then f(45) = 26 means that a tomato plant that is 45 days old will be 26 inches tall.
Another way to think about it is that the function f(x) is a mathematical model of the relationship between the height of a tomato plant and its age. The fact that f(45) = 26 tells us that this model predicts that a tomato plant that is 45 days old will be 26 inches tall.
I hope this helps out