Q. Write the equation in vertex form for the parabola with vertex (0,4) and focus (0,2).Simplify any fractions.______
Identify Orientation: Identify the orientation of the parabola based on the vertex and focus.Since the vertex and focus have the same x-coordinate, the parabola is vertical.
Determine Opening Direction: Determine the direction the parabola opens.The focus is at (0,2), which is below the vertex (0,4), so the parabola opens downward.
Calculate Value of 'a': Calculate the value of 'a' using the distance between the vertex and focus.Distance = ∣4−2∣=2Since the parabola opens downward, 'a' is negative.a=−4×distance1=−4×21=−81
Write Equation in Vertex Form: Write the equation in vertex form using the vertex (h,k)=(0,4) and the value of ′a′.y=a(x−h)2+ky=−81(x−0)2+4y=−81x2+4
More problems from Write equations of parabolas in vertex form using properties