Question 1041244
{{{ y = -4x^2 - 2 }}}
Swap x's and y's to get inverse:
{{{ x = -4y^2 - 2 }}}
{{{ -4y^2 = x + 2 }}}
{{{ y^2 = (-1/4)*( x + 2 ) }}}
{{{ y = sqrt( (-1/4)*( x + 2 ) ) }}}
Note that {{{ x <= -2 }}} in order for 
this inverse function to have real values
Also, I have to plot
{{{ y = -sqrt( (-1/4)*( x + 2 ) ) }}}
because it's included also
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Here are the plots:
{{{ graph( 500, 500, -10, 5, -10, 5, -4x^2 - 2, sqrt( (-1/4)*( x + 2 ) ),  -sqrt( (-1/4)*( x + 2 ) )) }}}This looks right since there is a reflection on the {{{ y = x }}} line