linear regression

f (x) Q Sekante f (x0 + ε) − f (x0 ) P f (x0 + ε) ε f (x0 ) x0 ε x0 + ε x...

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f (x)

Q

Sekante

f (x0 + ε) − f (x0 ) P

f (x0 + ε)

ε f (x0 ) x0

ε

x0 + ε

x