liz118 liz118
  • 10-07-2016
  • Mathematics
contestada

what is the equation of line in graph 4,0 0,-4

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sbcardinals
sbcardinals sbcardinals
  • 10-07-2016
First you want to find m (which is slope). We use point slope formula to find this. Since we have two points we can do this.

[tex] y_{1}-y =m( x_{1}-x)[/tex]
0+4 = m(4-0)
Divide both sides by 4

m=1

Now we use point slope formula. We only need one point, it doesn't matter  which, so take your pick (either 4,0 or 0,-4)
y=mx+b

0=1(4)+b

Simplify and solve for b

b=-4

Now you have your slope and y-intercept. That's all you need! :)

y=x-4 if your equation of the line
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