For this linear regression model, r2= 0.90. What does this mean?
A) The maximum long jump was around 90 inches.
B) Each year the winning long jump distance increased by 90%.
C) 90% of the variation in long jump distances is explained by the regression line.
D) The data ends around 1990
C) 90% of the variation in long jump distances is explained by the regression line.
(The number r2 gives the proportion of the variation in the long jump explained by the change in years.)