5. This graph shows the outside temperature (in degrees Celsius) over the course of 12 hours, starting at midnight (x = 0).
Part I:
a) What is the domain?
b) What does the domain mean in terms of the problem?
Part2:
a) what is the range?
b) what does the range mean in terms of the problem?
Part3:
a) when is the function decreasing?
b) what does the decreasing interval mean in terms of the problem?