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A(-4;3)
B(5;-3)
y=ax+b
3=-4a+b
-3=5a+b
b=4a+3
-3=5a+4a+3
-3-3=9a
a=-6;9
a=-⅔
b=4×(-⅔)+3=-⁸/₃+3=⅓
y=-⅔x+⅓
b)
C(-10;8)
8=-⅔×(-10)+⅓
8=²¹/₃
8≠7
nie należy