We have the following definite integral
[tex]\int ^9_{0.5}-2dx[/tex]
First, we solve the integral.
[tex]\int ^{}_{}-2dx=-2x+C[/tex]
secondly, we evaluate it in the limits of the integral.
[tex]\begin{gathered} \lbrack-2(9)\rbrack-\lbrack-2(0.5)\rbrack \\ \lbrack-18\rbrack-\lbrack-1\rbrack \\ -18+1 \\ -17 \end{gathered}[/tex]
In conclusion, the answer is -17
