Simpson's one-third rule with eight strips

A curve passing through the points $(x,y)$: $(1,0.2)$, $(2,0.7)$, $(3,1)$, $(4,1.3)$, $(5,1.5)$, $(6,1.7)$, $(7,1.9)$, $(8,2.1)$, $(9,2.3)$. The area bounded by the curve, the $x$-axis, $x=1$ and $x=9$ is: