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hreeg97

  • 3 years ago

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

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

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

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

  4. Outkast3r09
    • 3 years ago
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    and when i say y i mean -4y

  5. hreeg97
    • 3 years ago
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    subtract the 3x

  6. Outkast3r09
    • 3 years ago
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    yep now what do you get?

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

  8. Outkast3r09
    • 3 years ago
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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

  9. hreeg97
    • 3 years ago
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    divide by -4 ?

  10. Outkast3r09
    • 3 years ago
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    yep =]

  11. hreeg97
    • 3 years ago
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    so -3/4 and 3

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

  13. Outkast3r09
    • 3 years ago
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    12/-4=-3 -3/-4 = 3/4

  14. hreeg97
    • 3 years ago
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    thanks

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

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