Answer:
4.09
Step-by-step explanation:
Answer:

round off to 3s.f
means change to when you have 3 useful numbers
7613.83 has 4numbers.2decimal
same must be the round off value
1) Correct.
2) The y-intercept is when x=0, so it is (0,5).
I think it might be f^-1 (x) = x/2 - 3/2
I hope this helps!