anonymous
  • anonymous
What is the y coordinate of the y−intercept of the line that passes through the points (−2, −2) and (2, 4)?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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3psilon
  • 3psilon
Use the slope formula \[\frac{ y_{2}-y_{1} }{ x_{2}-x_{1} }\]
anonymous
  • anonymous
Oh do this again? Okay got it hahah
3psilon
  • 3psilon
\[\frac{ 4-(-2) }{2-(-2) }\]

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3psilon
  • 3psilon
Yes . Get it ? :)
anonymous
  • anonymous
I do! thanks!
3psilon
  • 3psilon
But wait that's the slope. You need the y intercept which is the b in y = mx +b
anonymous
  • anonymous
oh.
3psilon
  • 3psilon
So we found the slope m . Now just plug in One of the two coordinates and the slope into y = mx + b and solve for b. Let me know if you need more help
anonymous
  • anonymous
I need more help forsure
3psilon
  • 3psilon
Ok did you find the slope m?
anonymous
  • anonymous
finding it now.
3psilon
  • 3psilon
Ok let me know what you get
anonymous
  • anonymous
I got 3/2?
3psilon
  • 3psilon
Good job! Now we use the slope intercept formula y = mx + b
3psilon
  • 3psilon
pick either (−2, −2) or (2, 4) to plug in for x and y
3psilon
  • 3psilon
And you'll be able to solve for the y - intercept b
anonymous
  • anonymous
so -2=3/2(-2)+b? lo
3psilon
  • 3psilon
Perfect! Now just solve for b and you have your answer!
anonymous
  • anonymous
how though?!
anonymous
  • anonymous
I just cant find an answer...
3psilon
  • 3psilon
Just isolate the term b
3psilon
  • 3psilon
b is the y intercept
anonymous
  • anonymous
Is -1=3/2(-2) it?
3psilon
  • 3psilon
nope I'll draw it out for you. one sec
anonymous
  • anonymous
ok
3psilon
  • 3psilon
|dw:1350673516403:dw|
anonymous
  • anonymous
So the answer is 1?
3psilon
  • 3psilon
Yes , b = 1 . Do you get it?
anonymous
  • anonymous
Now that you wrote it out, i get it. thank you!

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