Question

A plant measured x inches tall last week and 8 inches tall this week.

Which expression represents the number of inches the plant grew this week? Explain how you know.
8 - x
x - 8

Answer 1

8 - x

Explanation:

8 - x; this is because the "x" inches last week is smaller than how tall it is this week, therefore, x - 8 would make the difference a negative number which isn't possible, leaving the option of 8 - x