X=5, y=-4
(5,-4)
do you need the work?
11n - 3 = 9 + 5n
solving:
11n-3=9+5n
+3 +3
11n=9+5n
-5n -5n
6n=9
/6 /6
n= 3/2 (check if correct)
Find the concavity changes of f(x).
Give the x-coordinates.
So, the answer to the multiple choice question is -1 and 5 since those points are where f''(x) changes sign.
Note: You can tell that you're supposed to find the concavity changes of f(x) and not f''(x) because from the graph it's obvious that the concavity of f"(x) doesn't change.