(y−yA)(xB−xA)−(yB−yA)(x−xA)=0
-2a +
b = 4
3a + b = -1
2a + b = -4
5a = -5
a = -1
-2 * ( - 1 ) + b = 4
2 + b = 4
b = 2
y = -x +2
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(y−yA)(xB−xA)−(yB−yA)(x−xA)=0
-2a +
b = 4
3a + b = -1
2a + b = -4
3a + b = -1
5a = -5
a = -1
-2 * ( - 1 ) + b = 4
2 + b = 4
b = 2
y = -x +2