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 one year ago
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What are the vertex and the axis of symmetry of the equation?
y = –2x2 + 8x – 18
a. vertex: ( 2, –10)
axis of symmetry: x = 2
b. vertex: (2, –10)
axis of symmetry: x = –10
c. vertex: (–2, –10)
axis of symmetry: x = –2
d. vertex: (–2, 10)
axis of symmetry: y = –2
 one year ago
Help?? What are the vertex and the axis of symmetry of the equation? y = –2x2 + 8x – 18 a. vertex: ( 2, –10) axis of symmetry: x = 2 b. vertex: (2, –10) axis of symmetry: x = –10 c. vertex: (–2, –10) axis of symmetry: x = –2 d. vertex: (–2, 10) axis of symmetry: y = –2

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satellite73
 one year ago
Best ResponseYou've already chosen the best response.1\[y=ax^2+bx+c\] \[ y = –2x^2 + 8x – 18\] first coordinate of the vertex is always \(\frac{b}{2a}\) in your case it is \(\frac{8}{2\times (2)}=2\)

satellite73
 one year ago
Best ResponseYou've already chosen the best response.1second coordinate is what you get if you replace \(x\) by \(2\)
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