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Identify Form and Orientation: Identify the form of the equation and determine the orientation of the parabola.The equation x=21(y+3)2+5 is in the form x=a(y−k)2+h, which indicates a horizontal parabola.
Compare with Standard Form: Compare the given equation with the standard form to find h and k.Standard form: x=a(y−k)2+hGiven: x=21(y+3)2+5Here, k=−3 and h=5.
Determine Axis of Symmetry: Determine the axis of symmetry using the value of k. For a horizontal parabola in the form x=a(y−k)2+h, the axis of symmetry is y=k. Thus, the axis of symmetry is y=−3.
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