Question

How do you graph the line `x-y=5`?

Answer 1

Find at least two pair of coordinates that satisfy the equation;
plot those points;
draw a line through the points.

Explanation:

Given
`color(white)("XXX")x-y=5`
Some solution pairs would be:
#color(white)("XXX"){: (color(black)x,color(white)("XXX"),color(black)y), (0,,-5), (5,,0), (7,,2):}#
(the third pair were just to help verify the results)

Plot the points and draw a line through them: