The population P (in thousands) of Canada from 1994 to 2002 is shown in the table.

Year P

1994 29,036

1996 29,672

1998 30,248

2000 30,791

2002 31,414

Estimate the instantaneous rate of growth in 2000 by taking the average of two average rates of change. What are its units?

Estimate the instantaneous rate of growth in 2000 by measuring the slope of a tangent.