Question

Arnold has recorded the number of chirps per minute ( x) that crickets make at different temperatures (y). He has determined that the association is linear and that the line of best fit is y = 1 + 50. What is the interpretation of the slope and yintercept of this equation?

Answer 1

Choice D

Step-by-step explanation:

The slope of the line is

`\frac{\delta\text{temperature}}{\#ofchirps}=(60-50)/(40-0)=(1)/(4)\frac{temperature}{\text{chirp}}`

This says that for every 1 chirp there is a temperature increase of 1/4.

The y-intercept of the line is (0, 50) meaning when there are no chirps the temperature is 50 degrees.

Therefore, choice D is correct.