SOLUTION: how would you graph 3x-y=7?

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Question 10275: how would you graph 3x-y=7?
Answer by rapaljer(4551) About Me  (Show Source):
You can put this solution on YOUR website!
Because the equation is in standard form, I would find the x and y-intercepts. That is, let x = 0, and find y (it turns out that y =-7), and let y=0, which gives x = 7/3, or about 2 1/3. Graph these points, and you should get a straight line that looks like this:
Solved by pluggable solver: DESCRIBE a linear EQUATION: slope, intercepts, etc
Equation 3+x+%2B+-1+y+=+7 describes a sloping line. For any
equation ax+by+c = 0, slope is -a%2Fb+=+-3%2F-1.
  • X intercept is found by setting y to 0: ax+by=c becomes ax=c. that means that x = c/a. 7/3 = 2.33333333333333.
  • Y intercept is found by setting x to 0: the equation becomes by=c, and therefore y = c/b. Y intercept is 7/-1 = -7.
  • Slope is -3/-1 = 3.
  • Equation in slope-intercept form: y=3*x+-7.
graph%28+500%2C+500%2C+2.33333333333333-8%2C+2.33333333333333%2B8%2C+-7-8%2C+-7%2B8%2C+3%2Ax%2B-7+%29+




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