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katlin95

  • one year ago

What is the inverse of y = 3x + 9?

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  1. Golferguy158
    • one year ago
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    -1/3x+9

  2. katlin95
    • one year ago
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    you guys mean y=9x+3 right?

  3. katlin95
    • one year ago
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    A. y= 1/3x-3 B. y=9x+3 C. y=1/3x+9 D. y=-1/3x-3

  4. katlin95
    • one year ago
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    still got y=3x+9 I think the actual answer is B

  5. katlin95
    • one year ago
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    cause were working with "inverse"

  6. Hoa
    • one year ago
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    Hi friend, you just replace x by y and y by x to get the inverse function. and then solve for y . to your problem, when replace you have x= 3y + 9 ---> 3y =x-9---> y = (x -9)/3 or y = 1/3x -3 . that is inverse function of your function hope this help

  7. katlin95
    • one year ago
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    so @Hoa our answer would be y=1/3x-3

  8. Hoa
    • one year ago
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    absolutely right. and that is the easiest way to get the inverse function

  9. katlin95
    • one year ago
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    thanks!

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