Question 1203017
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abscissa (not abcissa) = x coordinate; ordinate = y coordinate<br>
The two points are (2,4) and (-4,y).  By the distance formula...<br>
{{{(2-(-4))^2+(4-y)^2=72}}}
{{{6^2+(4-y)^2=72}}}
{{{(4-y)^2=36}}}
{{{4-y=6}}} or {{{4-y=-6}}}<br>
{{{y=-2}}} or {{{y=10}}}<br>
ANSWERS: -2 or 10<br>