Answer:
1 ft./yr.
Explanation:
When the question asks for rate of growth in a linear equation, we are going to look for slope. Slope formula is (y2-y1)/(x2-x1). We are given the points (2,5) and (5,8).
Now we can plug them into our formula:
(5-8)/(2-5)
-3/-3
1
Therefore, our rate of growth, or slope, is 1.