Q. A parabola opening up or down has vertex (0,2) and passes through (−6,5). Write its equation in vertex form.Simplify any fractions.
Vertex Form: 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.
Vertex Equation: What is the equation of a parabola with a vertex at (0,2)?Substitute 0 for h and 2 for k in the vertex form.y=a(x−0)2+2y=ax2+2
Find Value of a: Use the point (−6,5) to find the value of a. Replace the variables with (−6,5) in the equation. Substitute −6 for x and 5 for y. 5=a(−6)2+25=36a+2
Solve for a: Solve for a.5=36a+25−2=36a3=36aa=363a=121
Equation with a=121: What is the equation of the parabola if a=121?Substitute 121 for a in the equation y=ax2+2.y=(121)x2+2Vertex form of the parabola: y=(121)x2+2
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