sissyedgar
  • sissyedgar
What is the slope-intercept form of the function that contains the points (3, 1) and (2, 9)? y = ___ x + ___ Thankiez!!!! ღ
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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sissyedgar
  • sissyedgar
@TheSmartOne @StudyGurl14
TheSmartOne
  • TheSmartOne
We first need to find the slope! :) \(\sf\Large Slope = \frac{\color{blue}{y_2}-\color{red}{y_1}}{\color{green}{x_2}-\color{purple}{x_1}}\) Where the two points are in the form: \(\sf\Large (\color{purple}{x_1},\color{red}{y_1})~and~(\color{green}{x_2},\color{blue}{y_2})\)
sissyedgar
  • sissyedgar
Sorry internet was laggy! ( 3,1 ) ღ ( 2,9 )

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TheSmartOne
  • TheSmartOne
so those are the two points, now we plug them in. I even added colors to make it easier! :)
sissyedgar
  • sissyedgar
So.... y = 8x + -1 Right? ღ
TheSmartOne
  • TheSmartOne
slope is -8 not 8, so re-do the y-intercept :)
sissyedgar
  • sissyedgar
So, y = -8x + -1
TheSmartOne
  • TheSmartOne
nope y = -8x + b plug in x = 3, and y = 1 and solve for b
sissyedgar
  • sissyedgar
-2
TheSmartOne
  • TheSmartOne
how?
sissyedgar
  • sissyedgar
3-1=-2
TheSmartOne
  • TheSmartOne
your ignoring the -8
TheSmartOne
  • TheSmartOne
1 = -8(3) + b
sissyedgar
  • sissyedgar
1 = -8(3) + -2?
TheSmartOne
  • TheSmartOne
nope, w =on't work what is 8 * 3 = ?
sissyedgar
  • sissyedgar
8*3=24
TheSmartOne
  • TheSmartOne
and so -8 * 3 = -24 and 1 = -24 + b
sissyedgar
  • sissyedgar
is the b -2?
TheSmartOne
  • TheSmartOne
noooooooooooo 1 = -24 + b add 24 on both sides what is 24 + 1 = ?
sissyedgar
  • sissyedgar
25
sissyedgar
  • sissyedgar
24+1=25 -24+24=0
TheSmartOne
  • TheSmartOne
so what does b = ?
sissyedgar
  • sissyedgar
25!
TheSmartOne
  • TheSmartOne
Correct! ღ Great job! ღ
sissyedgar
  • sissyedgar
My Heart! ღ xP
sissyedgar
  • sissyedgar
Quick Question tho... Is 25 what comes after the 'x+'? xP
sissyedgar
  • sissyedgar
@TheSmartOne
TheSmartOne
  • TheSmartOne
yes so y = -8x + 25
sissyedgar
  • sissyedgar
oooh, ok! Thankiez!!! ღ

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