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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schrodinger
  • schrodinger
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Mehek14
  • Mehek14
which one do you think?
anonymous
  • anonymous
A
Mehek14
  • Mehek14
it's not A because the line has (3,-2) not (3,2)

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Mehek14
  • Mehek14
but it has (-9,-6) not (-9,6)
anonymous
  • anonymous
so i have to replace the point into the equation
Mehek14
  • Mehek14
yes and see which one is true
Mehek14
  • Mehek14
let's see B
Mehek14
  • Mehek14
we will use the ordered pair (3,2) x = 3 y = 2
Mehek14
  • Mehek14
so in the equation x+3y=9 substitute the values 3 + 3(2) = 9 3 + 3*2 = 9 is that true?
anonymous
  • anonymous
yes
Mehek14
  • Mehek14
ok now let's try the second ordered pair (-9,6) x+3y=9 -9 + 3(6) = 9 -9 + 3 * 6 = 9 true?
anonymous
  • anonymous
yes
Mehek14
  • Mehek14
so that is the equation for the line!
anonymous
  • anonymous
thanks alot
Mehek14
  • Mehek14
yw ^_^

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