Odpowiedź:
A = ( 1 , 1 ) , B = ( - 3 , 4 )
xa = 1 , xb = - 3 , ya = 1 , yb = 4
(xb- xa)(y - ya) = (yb - ya)(x - xa)
(-3- 1)(y - 1) = (4 - 1)(x- 1)
-4(y - 1) = 3(x - 1)
- 4y + 4 = 3x - 3
- 4y = 3x - 3 - 4
- 4y = 3x - 7
4y = - 3x + 7
y = (- 3/4)x + 7/4
y = (- 3/4)x + 1 3/4
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Odpowiedź:
A = ( 1 , 1 ) , B = ( - 3 , 4 )
xa = 1 , xb = - 3 , ya = 1 , yb = 4
(xb- xa)(y - ya) = (yb - ya)(x - xa)
(-3- 1)(y - 1) = (4 - 1)(x- 1)
-4(y - 1) = 3(x - 1)
- 4y + 4 = 3x - 3
- 4y = 3x - 3 - 4
- 4y = 3x - 7
4y = - 3x + 7
y = (- 3/4)x + 7/4
y = (- 3/4)x + 1 3/4