Answer: (c)
Step-by-step explanation:
Given

Here, 
To get
, replace
in
by 

Using
and
it can be concluded that the domain of
is all real numbers except 0.
Therefore, its domain is given by

Option (c) is correct.
Answer:
A, C, and D.
Step-by-step explanation:
The other does not go through the origin, therefore it is not proportional.
Answer:
Sally has $10.25 or 1,025 pennies
Step-by-step explanation:
Y - 6= 5(x - 2)
y - 6 = 5x - 10
y= 5x - 4