Question 1012213
{{{ f(x) = x }}}
{{{ y = x }}}
This is a line with positive slope through
the origin at a 45 degree angle to the
x-axis
------------
If I say:
{{{ y = (1/2)*x }}}, that will bring the line
closer to the x-axis and pull it away from
the y-axis
------------
If I replace all the {{{ x }}} values with {{{ -x }}}
then the line will be reflected about the y-axis, so
the answer is:
{{{ f(x) = -(1/2)*x }}}
------------------
Here's a plot of the line:
{{{ y = x }}}
{{{ y = (1/2)*x }}}
{{{ y = -(1/2)*x }}}
 {{{ graph( 400,400, -10,10, -10, 10, x, (1/2)*x, -(1/2)*x  ) }}}