<PRE><B>Question 88579</B>
If the point is one the y-axis, your domain would be x = 0.
(0,y) and (3,4) are your points
{{{distance = sqrt((x2 - x1)^2 + (y2 - y1)^2)}}}
{{{5 = sqrt((3 - 0)^2 + (4 - y)^2)}}}
{{{25 = (3)^2 + (4 - y)^2}}}
{{{25 = 25 - 8y + y^2}}}
{{{0 = y^2 - 8y}}}
{{{0 = y(y - 8)}}}
y = 0 and y = 8
So: (0,0) and (0,8)
0 is not positive nor negative
Answer: (0,8)</PRE>