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What are the coordinates of the hole in the graph of the function f(x)?

 

Which graph represents the function?


 Jan 29, 2018
 #1
avatar+96067 
+2

First one

 

[ x^2 + 3x - 28 ]  / [ x + 7]        factor the numerator

 

[ (x + 7) (x - 4) ] / ( x + 7)  =

 

x - 4

 

The "hole" will occur  where    x + 7  = 0   ⇒  x   =  - 7

 

So     plugging in  x = -7   into   x - 4, we get   -7 - 4  = -11

 

So....the coordinates are  ( -7, - 11)

 

 

Second one.....the third graph is the correct one

 

See the graph here :    https://www.desmos.com/calculator/8ytbtiboqq

 

 

 

cool cool cool

 Jan 29, 2018
edited by CPhill  Jan 29, 2018

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