From the given figure b is (-1, -2)
To dilate it by a scale factor of 1/2
Multiply -1 by 1/2 to get x
[tex]\begin{gathered} x=-1\times\frac{1}{2} \\ x=-\frac{1}{2} \end{gathered}[/tex]Multiply -2 by 1/2 to get y
[tex]\begin{gathered} y=-2\times\frac{1}{2} \\ y=-1 \end{gathered}[/tex]