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Help 21,22

NotSoSmart  May 15, 2018
 #1
avatar+87334 
+1

21.   

 

This is an ellipse....in standard form, we have

 

x^2   +  y^2      =     1

___     ____

  1         4

 

The domain  is    -1  ≤ x   ≤ 1

The range  is  -2  ≤ y  ≤ 2

 

 

 

22.

 

Vertex =  (0,0)

Focus  (-4,0)

 

So we have

 

4px = -y^2         

 

p  = 4.......so we have

 

4(4)x  = -y^2

 

16x  = -y^2 

 

x  = (-1/16)y^2 

 

 

cool cool cool

CPhill  May 15, 2018

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