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anonymous

  • one year ago

What is the equation of the line that passes through the points (−1, 3) and (1, 11)?

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  1. Nnesha
    • one year ago
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    do you know the formula to find slope ?

  2. anonymous
    • one year ago
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    y=mx+b

  3. Nnesha
    • one year ago
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    that's the equation we need it later but first we have to find slope \[\huge\rm \frac{ y_2 -y_1 }{ x_2 -x_1 }\] and plug in order pair where x and y are \[\huge\rm (x_1 ,y_1) (x_2 ,y_2) \]

  4. anonymous
    • one year ago
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    so it would be 11-3 over 1-(-1)

  5. Nnesha
    • one year ago
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    yes yes right !! :=) solve

  6. anonymous
    • one year ago
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    8 over 2

  7. anonymous
    • one year ago
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    then it would be 4

  8. Nnesha
    • one year ago
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    yes right now use that equation plug in m balue m=slope and pick one of order pair replace xand y by their values solve for b

  9. anonymous
    • one year ago
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    ok thank u

  10. Nnesha
    • one year ago
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    let me know what you get!

  11. anonymous
    • one year ago
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    i dont understand what u said^

  12. Nnesha
    • one year ago
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    cool and thanks for telling me :=) so \[\huge\rm y = mx+b\] m=4 now you can pick one of order pair where x and y values are (x,y) and then substitute into the equation let's say (1,11) so replace x by 1 y by 11 and m by 4 solve for b

  13. anonymous
    • one year ago
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    7?

  14. Nnesha
    • one year ago
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    \[\huge\rm \color{red}y=\color{green}{m}\color{blue}{x}+b\] \[(\color{blue}{1},\color{Red}{11})\]

  15. anonymous
    • one year ago
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    is the answer 7

  16. Nnesha
    • one year ago
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    yes b =7 \[\huge\rm y=\color{green}{m}{x}+\color{ReD}{b}\] m=4 b=7 plug in &&& done!

  17. anonymous
    • one year ago
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    omg thanks

  18. Nnesha
    • one year ago
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    my pleasure

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