Answer:
Only option C is correct, i.e. The input, or independent variable, is years in operation.
Explanation:
Given is the scatter plot of Years in Operation vs. Enrollment at Daycare Center.
The input is always independent variable and is plotted along x-axis.
The output is always dependent variable and is plotted along y-axis.
From the graph, it is clearly visible that:-
x-axis: Years in Operation.
y-axis: Enrollment at Daycare Center.
It means "The input, or independent variable, is years in operation."
Hence, only option C is correct, i.e. The input, or independent variable, is years in operation.