Chapter 19 - From Data Production to Inference: Part III Review - Test Yourself - Page 448: 19.40

$r^{2}$ = .61 = 61% indicates that 61% of the variation in the number of fires per decade has been explained by the straight line relationship P < .01 indicates that an increase this extreme occurs by random chance in less than 1% of the cases.

$r^{2}$ = .61 = 61% indicates that 61% of the variation in the number of fires per decade has been explained by the straight line relationship P < .01 indicates that an increase this extreme occurs by random chance in less than 1% of the cases.