What is the difference between correlation and regression?

Correlation is used to represent the linear relationship between two variables. On the contrary regression is used to fit the best line and estimate one variable on the basis of another variable, as opposed to regression reflects the impact of the unit change in the independent variable on the dependent variable.

world war i had a devastating effect on german-americans and their cultural heritage. up until that point   german-americans, as a group, had been spared much of the discrimination, abuse, rejection, collective mistrust experienced by so many different racial and ethnic groups in the history of the united states. indeed, over the years, they had been viewed as a well integrated and esteemed part of american society. all of this change with the outbreak of war.  

i believe

clean air is essential for health and survival

clean air provides nitrogen gas for plant respiration

clean air supplies oxygen that enables living organisms to breathe

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i am brianly

sorry if this doesn't