A Study Found Correlation R = 0

Multiple Choice

A study found correlation r = 0.43 between high school math grades (on a 0 to 100 scale) and income 10 years after school. This says that the fact that hot dogs have different amounts of salt explains about

A) 18.5% of the observed variation in their calorie counts.
B) 43% of the observed variation in their calorie counts.
C) 65.6% of the observed variation in their calorie counts.
D) 98% of the observed variation in their calorie counts.