You can put this solution on YOUR website! How would I graph y - x = -1?
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Solve for y
y = x - 1
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Pick values for x and find y, at least 2 points.
Plot the points, draw a line thru them.
You could select a series of values for the variable and solve the equation for for each chosen value, giving you a set of ordered pairs (since both of the variables are linear, i.e. nothing raised to a power higher than 1, you only need two ordered pairs, but a third or fourth one is good for checking your arithmetic). Plot your ordered pairs and draw a straight line through them.
Or you could find a graphing calculator or program and enter the relation to see what you get.
Or you could do what I did when I first looked at your problem. I added to both sides of the equation and recognized the equation of a line in slope-intercept form with a slope of 1 and a -intercept of and then sketched this:
John
My calculator said it, I believe it, that settles it