anonymous
  • anonymous
Write the slope-intercept form of the line which passes through (4, 2) with a slope of 1/2. how do i solve this?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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lstrasmann
  • lstrasmann
use point slope form.. \[y - y_{1} = m(x - x_{1})\]
lstrasmann
  • lstrasmann
then solve for y
anonymous
  • anonymous
use slope point slope form y-y1=m(x-x1) m is slope

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anonymous
  • anonymous
wait its noym= y1-y/x-x1
kymber
  • kymber
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.
anonymous
  • anonymous
2=m4+b?
kymber
  • kymber
Yes, but put in the slope as m. Then you can solve for b.
anonymous
  • anonymous
where does trthe1/2 go?
anonymous
  • anonymous
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
kymber
  • kymber
1/2 is the slope. Plug it in for m.
anonymous
  • anonymous
ok 2=1/2(4)+b anf i try to find b right?
anonymous
  • anonymous
1. 2 = 1/2(4) + b 2. 2 = 2 + b 3. subtract 2 from each side to get b = 0
kymber
  • kymber
Thanks for just giving her the answer, Storm. She was about to do it on her own.
anonymous
  • anonymous
the thing isthats nit one of the answers y = 1/2 x + 2 y = 1/2 x y = 1/2 x + 4
anonymous
  • anonymous
your welcome
kymber
  • kymber
Since b is 0, you just don't need to have it there.
kymber
  • kymber
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.
anonymous
  • anonymous
so its the second one?
anonymous
  • anonymous
yes
anonymous
  • anonymous
ok thanks peoples!
kymber
  • kymber
Yes. \(\Large\ddot\smile\)
anonymous
  • anonymous
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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