2)
A=(1, 0)
3)
B=(0, -1)
4)
C=(5, 4)
D=(-3, -4)
5)
x0=1
6)
y > 0 dla x ∈ (1, ∞)
7)
y < 0 dla x ∈ (-∞; 1)
8) tak
[tex]\left \{ {{0=1a+b} \atop {-1=0a+b} \right. \\\left \{ {{0=a+b} \atop {-1=b}} \right. \\\left \{ {{0=a-1} /+1 \atop {b=-1}} \right. \\\left \{ {{1=a} \atop {b=-1}} \right. \\y=x-1[/tex]
