Linear
Approximation
Basic Ideas:
L(x) as an approximation of f (x).
The difference between them is the
error E(x)
of approximation.
f (x)
L(x)
x
actual
value: f (x)
approximation: L(x)
E(x) = L(x) – f(x)
Smaller E(x)
means better approximation.
