The scatterplot and the model in Fig. 59 describe the association between years and men€™s 200-meter run record times (in seconds).

a. Is the association positive, negative, or neither? What does that mean in this situation?
b. Estimate the slope of the model. What does it mean in this situation?
c. Estimate how much the record time decreased over 25 years.
d. A student says the result you found in part (c) describes how much the record time will decrease in the next 25 years. What would you tell the student?

Transcribed Image Text:

Years versus Men's 200-Meter Run Record Times 20,5 4 20.25 20 19.75 19.5 19.25 19 1950 1960 1970 1980 1990 2000 2010 Year