Hello!
First, let me explain the difference between discrete and continuous.
Discrete: only some numbers of the interval are on the input. For example, in the interval 1 - 10, consider only the integers.
Continuous: all the numbers of the interval are on the input. For example: in the interval 1 - 10, all values are considered (integers and decimals).
Knowing it, let's analyze your exercise:
The function D = 25 + 0.3x represents the daily rental charge D (in dollars) for x miles driven.
We can represent miles as integers and also decimals, right?
• 2 miles
,
• 5.750 miles
So, it means that all values can be considered.
Answer:
So, this is a continuous domain.