If the points on a scatterplot are clustered in a pattern that extends from the lower left to the upper right, this would suggest that the two variables depicted are:

Which of the following terms is used to describe any substance, such as a drug, chemical, or virus that can bring about a birth defect?

A) teratogen B) critical period C) carcinogen D) biohazard

Walter, age 83, is asked to read several passages that portray aging adults as passive and incompetent. Walter is most likely to respond with

A) more frequent help-seeking behavior. B) more frequent independent behavior. C) less desire for social contact. D) less trouble performing daily activities.