Rise in Sea Level The global sea level could rise due to partial melting of the polar ice caps. The table represents a function R that models this expected rise in sea level in centimeters for the year t. (This model assumes no changes in current trends.) t (yr) 1990 2000 2030 2070 2100 R (t)(cm) 0 1 18 44 66 Source: A. Nilsson, Greenhouse Earth. a. Is R a one-to-one function? Explain. b. Use R(t) to find a table for R-¹(t). Interpret R-¹.

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