Q. Write the equation in vertex form for the parabola with vertex (0,7) and directrix y=6.Simplify any fractions.______
Identify orientation: Identify the orientation of the parabola.Since the directrix is horizontal y=6, the parabola is vertical.
Determine opening direction: Determine the direction the parabola opens. The vertex (0,7) is above the directrix y=6, so the parabola opens upwards.
Find distance to directrix: Find the distance between the vertex and the directrix.Distance = ∣7−6∣=1.
Calculate value of 'a': Calculate the value of 'a' using the distance.The distance is equal to 4a1, so a=41.
Write vertex form: Write the vertex form of the parabola using the vertex (h,k)=(0,7) and the value of ′a′. The vertex form is y=a(x−h)2+k. Substitute a=41, h=0, and k=7. y=41(x−0)2+7.
Simplify equation: Simplify the equation. y=41x2+7.
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