Answer:
Option C. 2
Step-by-step explanation:
Let
x ----> the number of days
y ----> the internet charges in dollars
we have

This is a proportional relationship between the variables x and y
The slope of the linear function is equal to the constant of proportionality k

The unit rate is the same that the slope
so
The unit rate is $2 per day
therefore
The unit rate in the equation is 2
2.; it’s the easiest, fastest, and simplest way to get to your factors
36/10 is 36 divided by 10
So, you would divide 36 by 10 and as
36 = 36.000...
You would move the decimal place one place to the left.
3.6000... = 3.6