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p(101,96)
x = 101, y = 96
q(123,140)
x = 123, y = 140
y = ax + b
Układ równań.
101a + b = 96
123a + b = 140 /*(-1)
101a + b = 96
- 123a - b = - 140
(+)-----------------------
-22a = -44
a = 2
a = 2
101*2 + b = 96
a=2
202 + b = 96
a=2
b = -106
Równanie prostej:
y = 2x - 106