Table 2 gives U.S. high school dropout rates as percentages for selected years since 1990. A linear regression model for the data is

r = -0.308t + 13.9

where t represents years since 1990 and r is the dropout rate.
(A) Interpret the slope of the model.

(B) Draw a scatter plot of the data and the model in the same coordinate system.
(C) Use the model to predict the first year for which the dropout rate is less than 3%.

Transcribed Image Text:

Table 2 High School Dropout Rates (%) 1996 2006 2010 11.8 9.3 7.4 2002 10.5 2014 6.5