Sagot :
Answer:
https://math.libretexts.org/Bookshelves/Calculus/Book%3A_Calculus_(Apex)/03%3A_The_Graphical_Behavior_of_Functions/3.03%3A_Increasing_and_Decreasing_Functions
Step-by-step explanation:
copy that link then you can find the answer
I hope it can help