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krissywatts

  • 3 years ago

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

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  1. ghass1978
    • 3 years ago
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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

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

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

  4. heradog
    • 3 years ago
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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 \[-\frac{ 3 }{ 2 }x+\frac{ 9 }{ 2 }\]

  5. heradog
    • 3 years ago
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    sorry I messed that up hang on a second

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

  7. krissywatts
    • 3 years ago
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    and okay

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

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

  10. krissywatts
    • 3 years ago
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    @heradog ya there lol

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

  12. heradog
    • 3 years ago
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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)

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

  14. krissywatts
    • 3 years ago
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    thanks herdog

  15. heradog
    • 3 years ago
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    no problem

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