Define social identity in a paragaph

Social identity theory is the study of the interaction between personal and social identities in social psychology. The goal of social identity theory is to specify and predict the circumstances under which people perceive themselves as individuals or as members of groups. The theory also takes into account the effects of personal and social identities on individual perceptions and group behavior.

ps. rewrite this a bit love:)

If you start at (-3,1) and end up at (0,3), you will have increased x by 3 and y by 2.  Thus, the slope of this line is  m = rise / run = 3 / 2.

Using the point-slope form of the equation of a straight line, we get:

y - 1 = (3/2)(x+3).

This could be rewritten in other forms:

y = 1 + (3/2)x + 9/2, or y = 2/2 + (3/2)x + 9/2, or y = (3/2)x + 11/2.