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hreeg97

find the slope and y-intercept of each line: 3x-4y=12

  • one year ago
  • one year ago

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  1. Outkast3r09
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    have you seen the slop intercept form : y=mx+b?

    • one year ago
  2. hreeg97
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    yes but how do i get i to y=mx=b form

    • one year ago
  3. Outkast3r09
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    alright so first you want y by itself correct? what can you do to get y by itself

    • one year ago
  4. Outkast3r09
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    and when i say y i mean -4y

    • one year ago
  5. hreeg97
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    subtract the 3x

    • one year ago
  6. Outkast3r09
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    yep now what do you get?

    • one year ago
  7. hreeg97
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    you have -4y=12-3x -3 would be your slope and 12 is your y intercept?

    • one year ago
  8. Outkast3r09
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    not exactly , the equation says y=mx+b, not -4y=mx+b. so you need one more step to get y's constant to be one

    • one year ago
  9. hreeg97
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    divide by -4 ?

    • one year ago
  10. Outkast3r09
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    yep =]

    • one year ago
  11. hreeg97
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    so -3/4 and 3

    • one year ago
  12. Outkast3r09
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    now you should have it in y=mx+b where m = slope and b is your y intercept

    • one year ago
  13. Outkast3r09
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    12/-4=-3 -3/-4 = 3/4

    • one year ago
  14. hreeg97
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    thanks

    • one year ago
  15. Outkast3r09
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    just a sign error but yes you have the right idea

    • one year ago
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