Answer:
D 
Step-by-step explanation:
Current coordinate of R : ( 1,5 ) 
Applying translation with rule (x,y) --> (x+1 , y-1) 
Coordinate after translation ( 1 , 5 ) ==> ( 1 + 1 , 5 - 1 ) ==> ( 2 , 4 ) 
applying dilation with scale factor of 3 , to apply dilation  multiply x and y values by scale factor which is 3 
Coordinate after dilation ( 2 , 4 ) ==> ( 2 × 3 , 4 × 3 ) ==> ( 6 , 12 ) 
The final coordinate is ( 6 , 12 )