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The minimum of the graph of a quadratic function is located at (–1, 2). The point (2, 20) is also on the parabola. Which function represents the situation? A) f(x) = (x + 1)2 + 2 B) f(x) = (x – 1)2 + 2
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Jul 2, 2018
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The minimum of the graph of a quadratic function is located at (–1, 2). The point (2, 20) is also on the parabola. Which function represents the situation?
A) f(x) = (x + 1)2 + 2
B) f(x) = (x – 1)2 + 2
C) f(x) = 2(x + 1)2 + 2
D) f(x) = 2(x – 1)2 + 2
Mathematics
high-school
Edhedges
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Answer:
C
Explanation:
:V
Marshall Thompson
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Jul 3, 2018
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Marshall Thompson
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so then tat is the vetex
y=a(x-h)²+k
(h,k) is veretx
(-1,2)
y=a(x-(-1))²+2
y=a(x+1)²+2
(2,20) is a point
sub
y=20 when x=2
20=a(2+1)²+2
20=a(3)²+2
20=9a+2
minus 2 both sides
18=9a
divide both sides by 9
2=a
y=2(x+1)²+2
C
Tim Ayres
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Jul 8, 2018
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Tim Ayres
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