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# Confused

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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
+111328
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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....

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
+111328
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LOL!!!.....that's what we're here for....!!!!!

CPhill  Jan 16, 2019