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Answered

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Can someone please help me with ASAP. I need to do this by tonight thx.
Which equation represents a parabola with focus (3,8)
A. y=1/4(x-3)^2-9
B. y= 4(x+3)^2-8
C. y=1/4(x-3)^2-10
D. 4(x+2)^2+7
also please don't be a bot or a person who says " I don't know" its not helpful

Can Someone Please Help Me With ASAP I Need To Do This By Tonight Thx Which Equation Represents A Parabola With Focus 38 A Y14x329 B Y 4x328 C Y14x3210 D 4x227 class=

Sagot :

Answer:  C

Step-by-step explanation:

If a parabola is given by [tex]a(x - h)^2 + k[/tex], the focus is at the point [tex](h, k + 1/4a)[/tex].

We know the focus is [tex](3, 8)[/tex], so it should look like [tex]a(x - 3)^2 + k[/tex]. We can cross off B and D.

Let's check if A works: [tex]8 = -9 + 1/(4 \cdot \frac 14) = -8[/tex]. Obviously this is false, so we can cross off A.

Thus it's C by process of elimination.

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