Question 1119530
{{{y^2-4y+4x=0}}}

{{{-4x=y^2-4y}}}

{{{-4x+4=y^2-4y+4}}}

{{{highlight_green(-4(x-1)=(y-2)^2)}}}-------horizontal axis of symmetry, parabola opens to the left; vertex is right-most point on the parabola.

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{{{-4=4p}}}
{{{p=1}}}---------Directrix and focus both 1 unit away from the vertex.

<pre>
VERTEX       (1,2)
FOCUS         (0,2)
DIRECTRIX    {{{x=2}}}
</pre>