The values of function f(x) at 5 discrete points are given

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The values of function f(x) at 5 discrete points are given below:

Using Trapezoidal rule step size of 0.1, the value of ∫^0.4₀ f (x) dx is

1. 11
2. 21
3. 33
4. 22

Correct Option: D

=	h	[ (y₀ + y₄) + 2(y₁ + y₂ + y₃) ]
	2

=	0.1	[ (0 + 160) + 2(10 + 40 + 90) ] = 22
	2