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EmmaH

  • 2 years ago

Write the slope-intercept form of the line which passes through (4, 2) with a slope of 1/2. how do i solve this?

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  1. lstrasmann
    • 2 years ago
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    use point slope form.. \[y - y_{1} = m(x - x_{1})\]

  2. lstrasmann
    • 2 years ago
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    then solve for y

  3. 03225186213
    • 2 years ago
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    use slope point slope form y-y1=m(x-x1) m is slope

  4. EmmaH
    • 2 years ago
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    wait its noym= y1-y/x-x1

  5. kymber
    • 2 years ago
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    Slope-intercept form is y = mx + b All you do is plug in the slope and the point given in the problem and then figure out the y-intercept. (b) m is the slope and x and y is the point given. (4, 2) (x, y) So plug these into the formula and solve for b. Once you find b, then you plug it back into the formula along with the slope and you're done.

  6. EmmaH
    • 2 years ago
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    2=m4+b?

  7. kymber
    • 2 years ago
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    Yes, but put in the slope as m. Then you can solve for b.

  8. EmmaH
    • 2 years ago
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    where does trthe1/2 go?

  9. Stormegeddon
    • 2 years ago
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    Slope Intercept form: y = mx + b y axis = 2 so *2 = mx + b* x axis is 4 so * 2 = m(4) + b m = slope sp *2 = 1/2(4) + b now multiply 1/2 * 4 to get 2 now we have 2 = 2 + b subtract 2 from each side b = 0

  10. kymber
    • 2 years ago
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    1/2 is the slope. Plug it in for m.

  11. EmmaH
    • 2 years ago
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    ok 2=1/2(4)+b anf i try to find b right?

  12. Stormegeddon
    • 2 years ago
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    1. 2 = 1/2(4) + b 2. 2 = 2 + b 3. subtract 2 from each side to get b = 0

  13. kymber
    • 2 years ago
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    Thanks for just giving her the answer, Storm. She was about to do it on her own.

  14. EmmaH
    • 2 years ago
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    the thing isthats nit one of the answers y = 1/2 x + 2 y = 1/2 x y = 1/2 x + 4

  15. Stormegeddon
    • 2 years ago
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    your welcome

  16. kymber
    • 2 years ago
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    Since b is 0, you just don't need to have it there.

  17. kymber
    • 2 years ago
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    So you plug the slope back into the original equation once your have b. But in this case, you just plug the slope into the equation and ignore b.

  18. EmmaH
    • 2 years ago
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    so its the second one?

  19. Stormegeddon
    • 2 years ago
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    yes

  20. EmmaH
    • 2 years ago
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    ok thanks peoples!

  21. kymber
    • 2 years ago
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    Yes. \(\Large\ddot\smile\)

  22. 03225186213
    • 2 years ago
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    y-2=1/2(x-4) y-2=1/2x-2 add 2 on both sides y=1/2x here y intercept is 0

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