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f(x)= 2x - 3
A=(-1,0)
y = 2x + b
Podstawiamy
2 * (-1) + b = 0
-2 + b = 0
b=2
y=2x + 2
b)y= ax + b
f(x) = 1,2x+2
A=(0,-3)
y=1,2x + b
1,2 * 0 + b = -3
b=-3
y=1,2x-3