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wzór: y = -3x
y = ax
-300 = a * 100
-3 = a
B)A=(-200,300)
wzór:y = - 3/2 x
300 : -200 = -3/2
C)A=(1/10 , 1/20)
wzór: y = 1/2x
1/20 : 1/10 = 1/20 * 10 = 1/2
D)A=(-1/12 , -1/6)
wzór: y = 2x
-1/6 : (-1/12) = -1/6 * (-12) = 2