Question 656262
{{{sqrt(x) + y = 12}}}

{{{sqrt(x) -12 = y}}} .........or every number you plug into {{{x}}}, there will be a number {{{y}}} that would result

so yes, it is a function

here is a graph:

{{{ graph( 600, 600, -5, 10, -15, 10, sqrt(x) -12) }}}