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whadduptori

  • 3 years ago

Please help? Write an equation of the line, in point-slope form, that passes through the two given points. points: (–2, 15), (9, –18)

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  1. dpaInc
    • 3 years ago
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    can you calculate the slope of the line passing through those two points? use: \(\Large slope=m=\frac{y_2-y_1}{x_2-x_1} \)

  2. dpaInc
    • 3 years ago
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    do you know how to use the slope formula?

  3. whadduptori
    • 3 years ago
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    would the answer be y-15=-3(x+2)

  4. dpaInc
    • 3 years ago
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    yep...:)

  5. dpaInc
    • 3 years ago
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    of course, the answer is not unique... you could've also used the other (9, -18).... :)

  6. dpaInc
    • 3 years ago
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    *other point (9, -18)

  7. whadduptori
    • 3 years ago
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    thank you so much! do you mind helping?

  8. whadduptori
    • 3 years ago
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    i have one more

  9. dpaInc
    • 3 years ago
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    go ahead and post up a new question.... i don't think open study will run out of hard drive space anytime soon.

  10. whadduptori
    • 3 years ago
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    What is the equation of the given line in standard form? Use integer coefficients. y = –1.7x + 8.5

  11. dpaInc
    • 3 years ago
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    this is standard form: Ax + By = C, where A, B, C are integer coefficients... so in your slope-intercept form, we need to clear the decimals by multiplying by the whole equation by 10... \(\Large y = –1.7x + 8.5 \) \(\Large \color {red}{10}[y = –1.7x + 8.5] \) can you tell me what youd get here?

  12. whadduptori
    • 3 years ago
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    17x + 10y = 85 ?

  13. dpaInc
    • 3 years ago
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    u got it.... :) nice job..

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