Writing+Linear+Functions-Target+D-Is+it+a+Good+Fit?-Investigations

**Target 4D: Given a set of data, determine the linear regression equation interpret the slope and y-intercept and use to solve problems.**
Where Wolves?

This investigation will focus on using linear regression determine what is the population trend for gray wolves. Click on the image below and enter the class code ** 8rfw ** of the ** Class Code ** provided by your teacher to complete the activity.



Weather Bug media type="custom" key="26406146" Have you ever wondered why the chirping of crickets sounds so loud on a summer night? Why is the chirping sometimes faster of slower? The sounds are made by the male cricket rubbing its wings together to serenade the female crickets. There is an interesting relationship between the frequency of the chirps and the temperature. Below is the data collected by [|Dr. Peggy LeMone] at her home in Colorado during the summer of 2007 comparing the temperature in Fahrenheit and the number of cricket chirps in 15 seconds. Dr. LeMone is currently a senior scientist at the [|National Center for Atmospheric Research]. Use the sliders to determine a best fit line for the data. media type="custom" key="26405104"

What is your equation of a best fit line?

What is the equation of the best fit line?

In 1897 Amos Dolbear published an article called "[|The Cricket as a Thermometer"]. He wrote that the temperature is equal to the number of chirps per minute minus 40 divided by four and add 50. How does the equation of the best fit line compare to Dolbear's equation?

What are some reasons why the equations are different?

What is the domain and range of the data?

Explain the values for the range.