Question 1079778
.
I need a little help. Does this parabola open up/down or left/right? 
{{{Y^2}}} -{{{(x^2/4)}}} = 1
~~~~~~~~~~~~~~~~~~~~~~


<pre>
{{{Y^2}}} -{{{(x^2/4)}}} = 1  --->

{{{y^2}}} = {{{1 + x^2/4}}}  --->

y = +/- {{{sqrt(1 + x^2/4)}}}


{{{graph( 330, 330, -10.5, 10.5, -10.5, 10.5,
          sqrt(1 + x^2/4), -sqrt(1 + x^2/4)
)}}}


Plots y = {{{sqrt(1 + x^2/4)}}} (red) and y = {{{-sqrt(1 + x^2/4)}}} (green)
</pre>

It is not a parabola . . . 



Actually, it is a hyperbola, instead.