y=ax+b
-2*a=-1
a=1/2
1=1/2*(-2)+b
1=-1+b
1+1=b
b=2
y=1/2x+2
f(x)=-2x-3; A=(-2,1)
a=-2
a1=1/2
y=1/2x+b
y=1/2x+2- równanie prostej prostopadłej
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y=ax+b
-2*a=-1
a=1/2
1=1/2*(-2)+b
1=-1+b
1+1=b
b=2
y=1/2x+2
f(x)=-2x-3; A=(-2,1)
a=-2
a1=1/2
y=1/2x+b
1=1/2*(-2)+b
1=-1+b
b=2
y=1/2x+2- równanie prostej prostopadłej