anonymous
  • anonymous
write an equation in the form y=mx+b for the line that has a slope of 4 and contains the point (-1,-3)
Algebra
katieb
  • katieb
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pooja195
  • pooja195
\[\huge~y-y_1=m(x-x_1)\] m=slope (x1,y1)
pooja195
  • pooja195
We know that the slope is 4 so m= slope We know x1 = -1 we know y1=-3 now just plug those into the formula :)
anonymous
  • anonymous
2

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pooja195
  • pooja195
huh? 2 for what?
pooja195
  • pooja195
i plugged it in for you :) now solve \[ \huge~y+3=4(x+1) \]
pooja195
  • pooja195
Do you know what to do after this?
anonymous
  • anonymous
multiply 1 from 4
anonymous
  • anonymous
?
pooja195
  • pooja195
no distribute
anonymous
  • anonymous
how do i distribute
pooja195
  • pooja195
4(x+1) 4*x=? 4*1=?
anonymous
  • anonymous
4
pooja195
  • pooja195
y+3=4x+4 now we need to isolate y so we need to subtract 4-3=?
anonymous
  • anonymous
1
pooja195
  • pooja195
good so our final answer would be??
anonymous
  • anonymous
y=4x+1
pooja195
  • pooja195
good

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