ANSWER
[tex]b)-3[/tex]EXPLANATION
We want to find the value of the expression:
[tex]\frac{xy}{2}[/tex]for:
[tex]\begin{gathered} x=-1 \\ y=6 \end{gathered}[/tex]To do this, substitute the values of x and y into the expression.
That is:
[tex]\begin{gathered} \frac{(-1)(6)}{2} \\ \Rightarrow\frac{-6}{2} \\ \Rightarrow-3 \end{gathered}[/tex]The answer is option b.
