Chapter 5.2, Problem 21E

The authors of the paper referenced in the previous exercise state that “when temperatures were warmer, more larvae were captured moving upstream, but when temperatures were cooler, more larvae were captured moving downstream.”

1. a. Do the scatterplot and least-squares line from the previous exercise support this statement? Explain.
2. b. Approximately what mean temperature would result in a prediction of the same number of salamander larvae moving upstream and downstream?