**Approximate the area between the $x$-axis and $f(x)$ from $x = -2$ to $x = 9$ using a *left Riemann sum* with $4$ unequal subdivisions.** | | |||| :-: | -: | -: | -: | -: $x$ | $-2$ | $0$ | $2$ | $6$ | $9$ $f(x)$ | $7$ | $11$ | $2$ | $8$ | $1$ The approximate area is [[☃ numeric-input 1]] units$^2$.