anonymous
  • anonymous
write an equation in the form y =mx+b for the line that passes through the point (-5,-1) and has a slope of -2
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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tkhunny
  • tkhunny
Well, do it. You have "y = mx + b" and you are give the slope. Simply substitute that. y = -2x + b Now what? That point was given for a reason.
anonymous
  • anonymous
do i subtract -2 from -1
tkhunny
  • tkhunny
Why would you do that? Use the given point. (x,y) = (-5,-1)

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More answers

anonymous
  • anonymous
i dont understand
tkhunny
  • tkhunny
What does (-5,-1) mean when it indicates a point on a line?
pooja195
  • pooja195
Before any of the we need to do the point slope formula \[\huge~y-y_1=m(x-x_1)\] m=slope (x1,y1)
anonymous
  • anonymous
y--2=m(x-x1)
pooja195
  • pooja195
We also have the slope :) m=-2 try again
tkhunny
  • tkhunny
Yes, we can use the point-slope formula, but then you have to remember that. I prefer simply thinking. Please answer my question. What does (-5,-1) mean when it indicates a point on a line?
anonymous
  • anonymous
y--1=m(x-x1
pooja195
  • pooja195
Still wrong. Let me help you out :) -5 = x1 -1 = y1 -2=m
pooja195
  • pooja195
Knowing that can you plug in the numbers?
pooja195
  • pooja195
Stuck?
tkhunny
  • tkhunny
|dw:1434125042262:dw| "plug in numbers" doesn't mean anything. The idea of "substitution" is universal and should be burned into your brain.
anonymous
  • anonymous
yes i am
pooja195
  • pooja195
@tkhunny im sorry that my learning and teaching style is nothing like yours.
pooja195
  • pooja195
y+1=-2(x+5) start by distributing \[\huge~-2(x+5) \] do you know how to do that part atleast?
anonymous
  • anonymous
-10
pooja195
  • pooja195
ok -2 * x = ?
tkhunny
  • tkhunny
@pooja195 No worries. We're all in this together. That's why I say, "I prefer this way." rather than "This is the way to do it or you are an idiot!" :-) Unique answers don't actually care how you find them. I am delighted there are different ways to go about it.
pooja195
  • pooja195
:)
pooja195
  • pooja195
\[\huge~y+1=-2x-10\] -10 + 1 =?
anonymous
  • anonymous
-9 and i like poojas more better understand a little
pooja195
  • pooja195
good so we have our answer :) y=-2x-9 :) and thanks
pooja195
  • pooja195
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anonymous
  • anonymous
thank u

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