Although Y is the abbreviation for yttrium, the X and Y ions in the video were entirely made up. Let's see how much made sense. Match the fictitious X-Y ions with their formulas.

The independent variable is the type of music.the dependent variable is the pulse rate.the intervening variable is the age of the subject.if the mother does not like rock, her pulse is likely to not increase.the same might be true for the sister.the friend may like rap and gets excited.to establish cause/effect relationship, all of the subjects must be consistent.hope i .

Idon't see the pic?

Carbon based or cells?

Dumb kids playing chess on freeways go spat domain