Answer:
b) The annual rainfall in a city
Step-by-step explanation:
Remember, a discrete variable is one that can only take a finite number of values between any two values of a characteristic and a continuous variable is one that can take an infinite number of values between any two values of a characteristic.
a) Observe that the variable x='classes taken in one semester' can take the values 0,1,2,...,n.
Then the variable x is discrete
b) Observe that the variable x='annual rainfall in a city' can take the values 2in, 1.6in, 5.1 in, 0.1in
Then, the variable x can be take a infinite number of values between two number. So x isn't a discrete variable.
c) The variable x='attendance at a football game' can take the values 3000,5000... n. And never will be a decimal number because There cannot be a personal decimal number. Therefore, x is a discrete variable.
d) The variable x='patients treated at an emergency room in a day' can take the values 1,2,3,...,n. And never will be a decimal number because There cannot be a personal decimal number. Therefore, x is a discrete variable.
