Answer:
4
--
3
Explanation:
Rate of Change via a table should be
f(x2)-f(x1)
-------------
x2 - x1
In this problem they indicated X2 is 36 and X1 is 18
At 36, F(X) is 61 and for 18, it's 37
Now to plug in...
61 - 37
----------
36 - 18
That boils down to
24
----
18
If we want to simplify it;
4
--. or. 1.333
3