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a= yb-ya
---------
xb-xa
2 +2
a = -------- = 4/10 = 2/5
6 + 4
y = ax + b, a = 2/5, b (6,2)
2 = 2/5 * 6 + b
-2/5 = b
y = 2/5x - 2/5
-2/5 x + y - 2/5 = 0
Mam nadzieję, że pomogłam! Miłego dnia! :D