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krissywatts

write an equation in slope-intercept form of the line whose y-intercept is -3 and the line is perpendicular line whose equation is 3x-2y=9 what is the slope intercept form? i need step by step help please

  • one year ago
  • one year ago

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  1. ghass1978
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    slope intercept form means y=mx+n m is the slope n the y-intercept n=-3 you still need m you know that if 2 lines are perpendicular ,the product of their slopes is -1 first thing now is to determine the slope of 3x-2y=9

    • one year ago
  2. krissywatts
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    i get -2y=-3/-2x-9/-2 correct

    • one year ago
  3. krissywatts
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    then my final answer should be y=-3/-2x-3 correct

    • one year ago
  4. heradog
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    if you have 2y=-3x+9 then divide all by 2 you get either y=(-3/2)x+(9/2) or you can factor to 3(x-3)/2 \[\frac{ 3(x-3)}{ 2}\] I prefer the first one which would look like \[-\frac{ 3 }{ 2 }x+\frac{ 9 }{ 2 }\]

    • one year ago
  5. heradog
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    sorry I messed that up hang on a second

    • one year ago
  6. krissywatts
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    oops 3/2x+9/2

    • one year ago
  7. krissywatts
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    and okay

    • one year ago
  8. heradog
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    yeah so it should be (-3x+9)/-2 which is \[\frac{ 3 }{ 2 }x-\frac{ 9 }{ 2 }\]

    • one year ago
  9. krissywatts
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    okay and the final answer should be y=-3/2x-3 or y=-2/3x-3?

    • one year ago
  10. krissywatts
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    @heradog ya there lol

    • one year ago
  11. heradog
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    sorry trying to do one of mine. yes y=-2/3x-3

    • one year ago
  12. heradog
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    because your perpendicular line is a negative reciprocal of the original one so the original was (3/2) and the negative reciprocal is (-2/3)

    • one year ago
  13. heradog
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    and they give you the y intercept of -3 or b

    • one year ago
  14. krissywatts
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    thanks herdog

    • one year ago
  15. heradog
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    no problem

    • one year ago
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