The independent variable is the detergent and the dependent variable is the cleanness of the cloths because it depends on how much detergent you use.
Explanation:
There's a simple reason why Japanese people can't pronounce R and L correctly. They don't exist in Japanese.
Hope this helps :)
Photo receptors are attached to the retina and are most numerous specifically at the fovea
It's known as severity.
The fact that her pain is on the scale between 1-10 refers to the severity of her pain.
Hope that helped ^U^