In a simple linear regression, if the correlation coefficient is 0.8, the percentage of variation in the response variable explained by the variation in the explanatory variable is: (Write your answer using whole numbers and round to 2 decimal places. Do not use the % symbol. Example: xx. yy)

Atype of plant is introduced into an ecosystem and quickly begins to take over. a scientist counts the number of plants after mmonths and develops the equation p(m)= 19.3(1.089)^m to model the situation. most recently, the scientist counted 138 plants. assuming there are no limiting factors to the growth of the plants, about how many months have passed since the plants werefirst introduced? a)o 6.1b)0.6.6c)10 72d)o 23.1