# Intervals of increase and the intervals of decrease?

y=-(x-3)^5(x+1)^4

For this function currently i have:

degree: 9
sign: negative ???
Roots: x=3 and -1
y-intercept= 243
domain: x belongs to E
range: y belongs to E
INTERVALS of INCREASE : ???
INTERVALS of DECREASE : ???
End Behaviors: As x approaches -infinity, y approaches infinity
as x approaches infinity, y approaches -infinity.

For the function y=-(x-3)^5(x+1)^4 what are the intervals of increase and the intervals of decrease?

I have been told to use derivatives. However, this isn't a calculus course and we haven't learned this yet

Redbelly98
Staff Emeritus
Homework Helper
What is true about the derivative when the function is increasing?

It is positive?

Redbelly98
Staff Emeritus