abbycross167
  • abbycross167
Write the point-slope (y - k = m(x - h)) form of the equation from the information given. 1. Slope = ½; (h, k) = (1, -2) Can someone please show me how to do this?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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trantom
  • trantom
so you know that m is the slope, so that part's easy then since h comes first before k in the ordered pair, you know that h is 1 and k is -2 so you plug those numbers into the equation. What do you get?
trantom
  • trantom
also (h,k) is a point which exists on the line given by the equation you get (just so you know what's going on)
abbycross167
  • abbycross167
-1? @trantom

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trantom
  • trantom
you're writing the whole equation right?
abbycross167
  • abbycross167
ummm I guess so
abbycross167
  • abbycross167
I'm sorry i'm not good at math
trantom
  • trantom
its ok
trantom
  • trantom
just replace the letters m, k, and h with their values
trantom
  • trantom
m is the slope, and it says that slope=1/2 so you would replace m with 1/2
trantom
  • trantom
it says (h,k) = (1,-2) so you would replace h with 1 and replace k with -2
abbycross167
  • abbycross167
yes sir/ ma'am, would I subtract like this~ 1-2?
trantom
  • trantom
no those are separate values, the negative two and the positive 1 also I'm a guy xD
abbycross167
  • abbycross167
ok, haha so would it be -3? @trantom
trantom
  • trantom
this is just a point-slope equation, it doesn't have an "answer"
trantom
  • trantom
your answer would look like the y-k=m(x-h) but instead of k, m, and h you will have -2, 1/2 and 1
trantom
  • trantom
so for instance if you replace m, it would look like y-k=1/2(x-h)
abbycross167
  • abbycross167
ok umm if I show you an example from my lesson can you show me how to make it look like the example?
trantom
  • trantom
sure
abbycross167
  • abbycross167
Example 1: Find the equation of the line through the points (2, -1), (-4, 3) First, find the slope as we did in lesson 11. (y2 - y1) (x2 - x1) (3 - -1) (-4 - 2) (4) (-6) So our slope is -2/3 Next, pick one of the points (either one will do) to put into the equation y -k = m(x - h). Be sure to change the signs of the coordinates. y + 1 = -2/3(x - 2) or y -3 = -2/3(x + 4)
abbycross167
  • abbycross167
how do I make my answer look like that?
trantom
  • trantom
\[y-(-2)=\frac{ 1 }{ 2 }(x-1)\]
trantom
  • trantom
and since subtracting a negative is the same as adding, its really y+2
trantom
  • trantom
but see how I replaced each of those letters (m, h, and k) with their values?
trantom
  • trantom
remember m is the slope
abbycross167
  • abbycross167
yes sir, but this is kind of confusing :/
trantom
  • trantom
do you have math tomorrow at school?
abbycross167
  • abbycross167
yes sir
trantom
  • trantom
ok you might want to ask your math teacher or maybe a friend at school, I think an online chat can only go so far you know
trantom
  • trantom
I'll try one more thing
trantom
  • trantom
|dw:1446698620384:dw|
abbycross167
  • abbycross167
So the equation is y+2=1/2(x-1)?
trantom
  • trantom
yep!
abbycross167
  • abbycross167
wow. I'm really slow... thank you soooo much for helping me!!!
trantom
  • trantom
no problem :)

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