Answer:
Quantitative: Age, heart rate, number of pets, salary
<em>discrete</em>: number of pets
<em>continuous</em>: Age, heart rate, salary
Categorical: Gender, eye color, metal rankings
<em>Nominal:</em> Gender, eye color
<em>Ordinal:</em> metal rankings
Explanation:
Quantitative are those variables which are for quantity or number with units for measurement.
Categorical are qualitative variable which can be categorized or grouped in different groups or it may be ranking scales
