Answer:
(d) f(x) = log₆(x)
Step-by-step explanation:
If we use y in place of f(x), we see that ...
x = 6^y
Taking logs of both sides, we get ...
log(x) = y·log(6)
y = log(x)/log(6)
y = log₆(x) . . . . . . . using the change of base formula
f(x) = log₆(x)
_____
Or you can get there more directly using the relation between logs and exponentials:

Answer:
D
Step-by-step explanation:
it's the only one where the y of each point has a linear (even if constant) trend, the others go up and down
Answer:
I'm pretty sure it's $5.00.
Answer:
x^2
Step-by-step explanation:

Hope this helps!