math [linear equations]
posted by lost and confused on .
graph the following equation
xy=5

If you can plot points, remember that two points determine a line. So, pick two easy points and plot them. Then draw a line through them.
So, what's easy? How about letting x=0 or y=0? That gives us
0y=5
y = 5
x0=5
x=5
So, our two points are
(0,5) and (5,0)
Now it should be clear. You can always pick other points if you want, but they won't really give you any more information.
If you want x=3, then 3y=5 and y = 2 so the point (3,2) is on the line too.