Without the ozone layer, life on earth would be in danger from increased levels of radiation.

Aline is drawn through (–4, 3) and (4, 3). which describes whether or not the line represents a direct variation? the line represents a direct variation because   -4\3 =4\3the line represents a direct variation because it is horizontal. the line does not represent a direct variation because it does not go through the origin. the line does not represent a direct variation because –4(3) ≠  4(3).