How do I find the area under the curve for $6-8$ seconds? The for height line is in between $-2$ and $-1$ and I$\text{'}$m not sure how to calculate that number. I know it's $\mathrm{.}5($base$*$height$)$ but is it supposed to be $1\mathrm{.}333$ or $1\mathrm{.}25$ or something else?

Consider the $"$ plot below describing motion

along a straight line with an initial position of

$10$ m $.$