anonymous
  • anonymous
Which equation represents the line passing through the points (3, 2) and (-9, 6)? A. x- 3y = 9 B. x + 3y = 9 C. 3x - y = −9 D. 3x + y = 9
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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terenzreignz
  • terenzreignz
Well, if you're in a hurry, you can plug in these points into the equations and see which equation works for both points.
terenzreignz
  • terenzreignz
Otherwise, you can use these two points to determine the exact equation of the line~ with or without those choices.
anonymous
  • anonymous
so i just plug in (3,2) and (-9,6) into x and y?

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terenzreignz
  • terenzreignz
Yes, that's one way to do it, arbitrary, but relatively quick... See which choice works for BOTH points.
anonymous
  • anonymous
okay i just tottaly confused myself lol
terenzreignz
  • terenzreignz
Okay, let's start with choice A... x - 3y = 9 and test the point (3,2) Replace x with 3 Replace y with 2 3 - 3(2) = 9 3 - 6 = 9 -3 = 9 Which is false, so it's not A.
anonymous
  • anonymous
x + 3y = 9 and test the point (3,2) Replace x with 3 Replace y with 2 3 + 3(2) = 9 3+ 6 = 9 9=9 so choice b is ture? i think?
terenzreignz
  • terenzreignz
Remember, BOTH points have to be tested... one is not enough...
anonymous
  • anonymous
x+3y=9 -9+3(6)=9 -9+18=9 9=9
anonymous
  • anonymous
so its b right?
anonymous
  • anonymous
@terenzreignz
terenzreignz
  • terenzreignz
Yup. Nice job :D
anonymous
  • anonymous
yay! thank you for your time :D

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