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anonymous

  • one year ago

What is the equation of the line, in point-slope form, that passes through the points (-3, -1) and (-6, 8)? y + 8 = -3(x - 6) y - 8 = -3(x + 6) y + 8 = 3(x - 6) y - 8 = 3(x + 6)

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  1. TheSmartOne
    • one year ago
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    The slope of two points: \(\sf (x_1,y _1)\) and\(\sf (x_2,y_2)\) is: \(\sf\Large Slope=\frac{y_2-y_1}{x_2-x_1}\)

  2. TheSmartOne
    • one year ago
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    And why is the point-slope form?

  3. anonymous
    • one year ago
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    idk

  4. TheSmartOne
    • one year ago
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    Ok, then google "point-slope form" and tell me what it is.

  5. anonymous
    • one year ago
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    Point slope form is also the quickest method for finding the equation of line given two points

  6. TheSmartOne
    • one year ago
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    what equation does it show you that you get for point-slope form?

  7. anonymous
    • one year ago
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    idk im bad at math

  8. TheSmartOne
    • one year ago
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    Not an excuse... Read the first 2 paragraphs: http://www.purplemath.com/modules/strtlneq2.htm

  9. TheSmartOne
    • one year ago
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    Point slope form is: \(\sf y – y_1 = m(x – x_1)\)

  10. anonymous
    • one year ago
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    ok?

  11. TheSmartOne
    • one year ago
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    calculate the slope first...

  12. anonymous
    • one year ago
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    idk how

  13. TheSmartOne
    • one year ago
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    Read my first reply on your post, it shows you how to.

  14. anonymous
    • one year ago
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    i got 2.3 for theslope

  15. TheSmartOne
    • one year ago
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    How? Where is the work?

  16. anonymous
    • one year ago
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    http://www.calculator.net/slope-calculator.html?type=1&x11=-3&y11=-1&x12=-6&y12=-8&x=84&y=12

  17. TheSmartOne
    • one year ago
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    *facepalm* You used a calculator, yet you plugged in the wrong point...

  18. anonymous
    • one year ago
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    my name explains me man

  19. TheSmartOne
    • one year ago
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    this will give you the correct slope... http://www.calculator.net/slope-calculator.html?type=1&x11=-3&y11=-1&x12=-6&y12=8&x=92&y=4

  20. anonymous
    • one year ago
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    now what

  21. TheSmartOne
    • one year ago
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    You have the slope, so now you can plug it into: \(\sf y – y_1 = m(x – x_1)\) m=slope \(\sf (x_1,y_1)\) is a point what is the slope again?

  22. anonymous
    • one year ago
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    -3

  23. anonymous
    • one year ago
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    can u just tell me answer

  24. TheSmartOne
    • one year ago
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    \(\sf (-3, -1)\) and \(\sf (-6,8)\) are both in the form of \(\sf (x_1,y_1)\) substitute any point into the equation.

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