anonymous
  • anonymous
write an equation in the form y=mx+b for the line which passes through (1,-10) and (-7,-2)
Algebra
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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pooja195
  • pooja195
First we need to find the slope any ideas on how to find it?
anonymous
  • anonymous
ok know how to do that give me a min
anonymous
  • anonymous
slopes -1

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More answers

pooja195
  • pooja195
ok next are you fimilar with the point slope formula?
anonymous
  • anonymous
not really can you remind me
pooja195
  • pooja195
\[\huge~y-y_1=m(x-x_1)\] m=slope int his case -1 next we select any random post lets go with (1,-10) so 1 = x1 -10=y1 now you just plug it into the formula
pooja195
  • pooja195
Are you ok with that? Do you know how to do it?
pooja195
  • pooja195
stuck? :/
anonymous
  • anonymous
a little
pooja195
  • pooja195
\[\huge~y--10=-1(x-1)\]
pooja195
  • pooja195
therefore we have \[\huge~y+10=-1(x-1)\] now distribute \[\huge~-1(x-1)\]
anonymous
  • anonymous
8
pooja195
  • pooja195
huh?
anonymous
  • anonymous
hold on messed up bad not smart at algebra at all
pooja195
  • pooja195
need help? :)
anonymous
  • anonymous
yes i need all the help i can
pooja195
  • pooja195
therefore we have \[\huge~y+10=-1(x-1)\] now distribute \[\huge~-1(x-1)\]
pooja195
  • pooja195
distribute :)
pooja195
  • pooja195
-1 * x = ? -1 * -1 =?
anonymous
  • anonymous
any thing that x right
pooja195
  • pooja195
-1x :) -1 * -1= ?
anonymous
  • anonymous
1
pooja195
  • pooja195
good so we have \[\huge~y+10=-1x+1\] we are trying to isolate y so what would the next step be?
anonymous
  • anonymous
so what your saying is get rid of 10 or change y
pooja195
  • pooja195
get rid of the 10
anonymous
  • anonymous
do i subtract 1 from 10
pooja195
  • pooja195
yes so 1-10= ?
anonymous
  • anonymous
-9
pooja195
  • pooja195
good so we get \[\huge~y=-1x-9\] thats all :)
anonymous
  • anonymous
thank you thank you thank you :)
pooja195
  • pooja195
:)
pooja195
  • pooja195
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