Frequency notes per second 20 Temperature degrees Celsius The line is the least squares regression line for predicting call frequency from temperature 16 18 0 85 O 0 75 01 J D Melisten The effergetics of mate reproductive behavior in the treefrog Hy versicolor MS thesis University of California at Irvine 205 28 Temperature explains approximately 75 of the variability in call frequency What is the approximate correla call frequency and temperature