Answer:
A.
Step-by-step explanation:
correct answer is
[tex]y=100*(0.91)^x.[/tex]
if to compare the values of the y, (0;100), (1;91), (2;82.81), (3; 75.3571), then
75.3571/82.81=82.81/91=91/100=0.91, it means the next value is decreased at 9%.
