Question 1091792
(4,1) point on rim, "across"
(0,0) vertex point, minimum
{{{y=ax^2}}}
{{{a=y/x^2}}}
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{{{cross(a=1/4)}}}
{{{a=1/4^2}}}
{{{a=1/16}}}
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{{{y=(1/16)x^2}}}
{{{16y=x^2}}}


{{{4d=16}}}
{{{d=4}}}--------Focus is 4 foot from the vertex, on the concave side.







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(fixed)