Most children say their first words at about __________ of age

Which of the following is true about self-esteem and narcissism?

a. The best way to be happy is to focus on ourselves and our own needs. b. Narcissists are disliked by others but do better academically and in business than other people. c. People who are optimistic (but not narcissistic) persevere more in the face of failure and set higher goals than do other people. d. Narcissism has been decreasing among college students in the United States over the past 30 years.

In the regression equation, y = .78 + .67x, .67 is

a. the criterion variable b. the correlation c. the regression constant d. the regression coefficient e. the predictor variable