Question

weight of kitten over time
weight (kg)
age of kitten (months)
which variable is the independent variable in this graph?
kilograms
age of kitten
weight of kitten
months

Explanation:

The independent variable is the one that is manipulated or changes freely. In a graph of weight of kitten over time, the age of the kitten (in months) is what is changing on its own, and the weight of the kitten depends on the age. Kilograms is a unit of measurement, not a variable. Months is the unit for the age - related independent variable, not the variable itself.

Answer:

B. Age of kitten