Answer:
x = -2 to x = 1
Step-by-step explanation:
A function is constant when the y value does not change (i.e. the graph is a horizontal line). This is true between x = -2 and x = 1.
Answer: None. The question asks about $4 per hour.
Step-by-step explanation: The cost changes by $4 every 2 hours.
That is $2 per hour.
