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I haven't learned about increasing/decreasing intervals yet, so I'm a little confused about this. Would the interval be where the line is located? Would the decreasing interval on the first one be y=-3? Please help me! Sorry

 Jan 16, 2019
 #1
avatar+96201 
+1

Increasing interval =  where does graph rise???

 

Decreasing interval = where does the graph fall ???

 

Note that the intervals are stated along x.....but....we look at y to determine if the graph rises or falls

And we read the graph from left to right

 

First one : 

 

This graph never rises......

So....the decreasing interval  is  ( - inf, inf)

 

Second one

Increasing interval   = (-2, inf)     Note that when x > -2....the graph rises 

Decreasing interval = (-inf, - 2)   Note that when x < -2  .....the graph falls from (-inf, -2)

 

Third one

 

This graph never decreases.....we have a vertical asymptote at x = -2

So  it increases from (-inf, -2)   and  (-2, inf) 

 

Hope this is clear....

 

 

cool cool cool

 Jan 16, 2019
 #2
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Yes, your explanation is clear and makes sense! Thank you for the help! Sorry for bothering you.

Guest Jan 16, 2019
 #3
avatar+96201 
0

LOL!!!.....that's what we're here for....!!!!!

 

 

cool cool cool

CPhill  Jan 16, 2019

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