Question 108304
The graph of the required curve looks as drawn below.


{{{ graph( 300, 300, -15, 15, -15, 15, 2x) }}} 


Or if u wud like the curve to eb still more precise then here it goes.


{{{ graph( 300, 300, -10, 10, -10, 10, 2x) }}}



both the curves are the same but only the scaling differs.