+0  
 
+1
53
1
avatar+293 

dont know how to do need hlep. need as soon as possible.please and thanks.

 Dec 3, 2020
 #1
avatar+114592 
+2

(8, -2)  

vertex = (2, -1)      

 

Since  we have a  vertical axis of symmetry, the  form will be

 

y  = a ( x - h)^2  +  k

 

(h,k)   = the vertex  =  (2,-1)      and   we know a point....so we can find  "a"  thusly

 

-2 = a ( 8 - 2)^2  -1        

 

-2 + 1  = a (6)^2

 

-1  = 36a

 

a = -1/36

 

The equation is

 

y= (-1/36)(x - 2)^2  - 1

 

See the graph here  :  https://www.desmos.com/calculator/myw1qujzjc

 

 

cool cool cool

 Dec 3, 2020

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