Answer:
S
Explanation:
If the dilation is of magnitude 3, then the lenghts of all segments must be thriced.
The center of dilation is at point P. If you have to find image of point Q, you should connect points Q and P (pre-image point and center of dilation) and thrice this segment.
So,
PQ→PS,
because PQ=1,
PS=PQ+QR+RS=1+1+1=3
Hence, the image point is point S