Anyone can help ? I’m so confused

8: 9, 9: 1, 10: -15

F(n)= 10 - n^2

n=1
n=3
n=5

Question #8:

Start with the n=1 so

F(n)= 10 - 1^2, than solve…

1^2 is 1 so 10-1= 9, there for the answer is 9

Question #9:

Now do n=3

F(n)= 10 - 3^2

3^2 is 9

10-9 is 1 so f(n)=1

Question #10:

n=5

F(n)=10-5^2

5^2= 25

10-25= -15

F(n)= -15

Ithink not so sure but i tried it out and came out to be b

Pp= 50 pounds of apples