Final answer:
The answer is (c) number of cars passed in the last 10 miles.
Step-by-step explanation:
The correct answer is (c) number of cars passed in the last 10 miles.
A discrete variable is a variable that takes on distinct values. In this case, the number of cars passed in the last 10 miles can only take on whole numbers, such as 0, 1, 2, etc. It cannot take on intermediate values.
On the other hand, options (a) miles walked in a week, (b) hours studied per day, and (d) your weight in the morning are all examples of continuous variables, as they can take on any value within a certain range.