Q. A parabola opening up or down has vertex (0,6) and passes through (8,−2). Write its equation in vertex form.Simplify any fractions.
Vertex Form of Parabola: What is the vertex form of the parabola?The vertex form of a parabola is given by the equation y=a(x−h)2+k, where (h,k) is the vertex of the parabola.
Equation with Vertex: What is the equation of a parabola with a vertex at (0,6)?Substitute 0 for h and 6 for k in the vertex form.y=a(x−0)2+6y=ax2+6
Find 'a' Using Point: Use the point (8,−2) to find the value of 'a'.Replace the variables with (8,−2) in the equation.Substitute 8 for x and −2 for y.−2=a(8)2+6−2=64a+6
Solve for 'a': Solve for 'a'.−2=64a+6Subtract 6 from both sides.−2−6=64a−8=64aDivide both sides by 64.−648=aSimplify the fraction.−81=a
Write Equation with 'a': Write the equation of the parabola with the value of 'a'.Substitute −81 for a in the equation y=ax2+6.y=(−81)x2+6Vertex form of the parabola: y=−(81)x2+6
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