Pls help ill give 100 points to brainliest

Below given.

Explanation:

The general form of a direct variation formula is  y=kx. passes axis at 0.Equations of the form y = kx + b where b is a number other than zero are not direct variation equations because when x is zero in any of these y is not zero.

1) Direct

2) Not Direct

3) Direct

4) Not Direct

5) Not Direct

6) Direct

7) Not Direct

8) Not Direct

An  atom  (ours, not carroll's) consists of a positively charged  nucleus, surrounded by one or more negatively charged particles called  electrons. the positive charges equal the negative charges, so the atom has no overall charge; it is electrically neutral. most of an atom's mass is in its nucleus; the mass of an electron is only 1/1836 the mass of the lightest nucleus, that of hydrogen. although the nucleus is heavy, it is quite small compared with the overall size of an atom. the radius of a typical atom is around 0.1 to 0.25 nanometres (nm), whereas the radius of a nucleus is about 10-6  nm.  *  if an atom were enlarged to the size of the earth, its nucleus would be only 200 feet in diameter and could easily rest inside a small football stadium.read more on -