Q. A parabola opening up or down has vertex (0,−6) and passes through (−8,10). 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+(−6)y=ax2−6
Use Point to Find 'a': Use the point (−8,10) to find the value of 'a'.Replace the variables with (−8,10) in the equation.Substitute −8 for x and 10 for y.10=a(−8)2−610=64a−6
Solve for 'a': Solve for a.10=64a−6Add 6 to both sides of the equation.16=64aDivide both sides by 64.6416=a41=a
Write Equation with 'a': Write the equation of the parabola with the value of a. Substitute 41 for a in the equation y=ax2−6. y=(41)x2−6 Vertex form of the parabola: y=(41)x2−6
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