There isn’t an answer because you haven’t provided us enough data
Answer:
81.75
Step-by-step explanation:
75*1.09 = 81.75
We can take out one of the points such as H (2,6) and then take it's dilation H' (1,3)and see that 2 and 6 were both multiplied by 1/2 to get 1 and 3, so the scale factor is 1/2