How do you graph #2x+5y=10# by plotting points?
Write the equation as
Choose x-values and work out y-values
It is difficult to find points when the equation is in this form.
Change it into
Then you can choose any x-value and work out its corresponding y-value. It is a good idea to have about 5 points, two with negative x-values, x= 0 and two with positive x-values.
This will give you a nice spread and you will easily be able to see if there are errors, because the points will not all lie in a straight line as they should.
When x = -5, y = 0, When x= 0, y = 2 etc