This is decay because it has a minus symbol . Usually when the percent is decay is, it will have a minus sign, if the percent is growth it will have a + symbol.
I hope this helps you!
Step-by-step explanation:
3x = 9 - 5y
9-5y+2y=3
9-3y=3
-3y=3-9
-3y=-6
y=2
3x +5y =9
3x + 5(2)= 9
3x + 10= 9
3x= 9-10
3x = -1
x= -1/3
Y= 2(1/4)^2
2×(1/4)= .5
2×.5= 1
So the answer is 1
Answer is c hope it helps :)