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i need a refresher on how to do a qeustion like this but i would rather have to get to the answer myself

 

sketch the graph and explicitly state the equations of any asymptotes, any non-permissible values as a coordinate, any intercepts and the domain and range

 

the equation is

y=(2x^2-5x-3)/(x^2-4x+3)

 Jun 1, 2016
 #1
avatar+129852 
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y=(2x^2-5x-3)/(x^2-4x+3)     factor  numerator/denominator

 

y = [ ( 2x + 1) (x - 3)] / [ (x - 1) (x - 3)]      "cancel" the (x - 3) factor and we have

 

y =  [ 2x + 1] / [ x - 1 ]

 

Here's the graph : https://www.desmos.com/calculator/yc7cj5ahco

 

There is a horizontal asymptote at y  = 2

 

A vertical asymptote occurs at x = 1

 

Domain =  all x  except x = 1  and x = 3

 

Range  = all y except y = 2

 

y intercept occurs at  (0, -1)

 

x intercept occurs at ( -1/2, 0)

 

 

 

cool cool cool

 Jun 1, 2016

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