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For this function currently i have:

degree: 9

sign: negative ?

quadrants: I, II and 4

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