Solve the Problem $98 \mathrm { ft }$ High And $30 \mathrm { ft }$

Multiple Choice

Solve the problem.
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A building has an entry the shape of a parabolic arch $98 \mathrm { ft }$ high and $30 \mathrm { ft }$ wide at the base. Find an equation for the parabola if the vertex is put at the origin of the coordinate system.

A) $x ^ { 2 } = - 2.3 y$
B) $\mathrm { y } ^ { 2 } = - 9.2 \mathrm { x }$
C) $x ^ { 2 } = - 9.2 y$
D) $y ^ { 2 } = - 2.3 x$