SOLUTION: find the y-intercept x-y=3

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Question 82419: find the y-intercept x-y=3
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
First solve for y:
x-y=3

-y=3-x Subtract x from both sides

y=-3%2Bx Multiply both sides by -1 to make y positive

So we have

y=x-3

So it is now in y=mx%2Bb form where m is the slope and b is the y intercept. Since b=-3 the y-intercept is (0,-3) (b is always the y coordinate of the y-intercept). Notice if we plug in x=0 we get

y=0-3

y=-3

This verifies our answer.

Also notice if we graph y=x-3 we get


+graph%28+300%2C+200%2C+-5%2C+5%2C+-5%2C+5%2C+x-3%29+

and you can see that the y-intercept is (0,-3)