anonymous
  • anonymous
The vertex of this parabola is at (-3,6). Which of the following could be it's equation? A. y=-3(x-3)^2-6 B. y=-3(x+3)^2-6 C. y=-3(x-3)^2+6 D. y=-3(x+3)^2+6
Geometry
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
@Haseeb96 , @sourwing , @ybarrap
anonymous
  • anonymous
Go read your algebra book. Seems like you still haven't fully grasp the concept
Haseeb96
  • Haseeb96
what do you think which one is correct

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More answers

anonymous
  • anonymous
|dw:1434836286187:dw|
ybarrap
  • ybarrap
Which quadrant is this parabola in?
anonymous
  • anonymous
2
Haseeb96
  • Haseeb96
correct
ybarrap
  • ybarrap
This will tell you the signs for h and k what's the sign for h ? what's the sign for k?
anonymous
  • anonymous
++?
Haseeb96
  • Haseeb96
no - and +
ybarrap
  • ybarrap
h is - but k is +
Haseeb96
  • Haseeb96
@ybarrap he is correct
ybarrap
  • ybarrap
$$ y=a(x-h)+k $$ So what do we have now if we put in those signs?
anonymous
  • anonymous
Which points are h and what are k again?
ybarrap
  • ybarrap
h is what moves this parabola left and right and k moves it up and down
anonymous
  • anonymous
is it y=-3(-3)^2+6?
Haseeb96
  • Haseeb96
no no
Haseeb96
  • Haseeb96
y=-3(x-(-3))+6
ybarrap
  • ybarrap
Close h is associated with x and k is associated with y change $$ y=-3(-3)^2+6 $$ to $$ y=-3(\color{red}{x}-(-3))^2+6 $$
anonymous
  • anonymous
so x+3
anonymous
  • anonymous
Ohhhhh
ybarrap
  • ybarrap
that's right, negative times a negative gives you a positive
Haseeb96
  • Haseeb96
because (h,k)=(-3,6) when we will put them in this equation y=-3(x-h)^2 + k we will get y=-3(x - (-3) )^2 + 6

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