(Modeling) Solve the problem.Recovery of Solid Waste  The percent W of municipal solid was...

(Modeling) Solve the problem.

Recovery of Solid Waste  The percent W of municipal solid waste recovered is shown in the bar graph. The linear model

W = 0.6286x+ 27.662,

where x = 0 represents 1998, x = 1 represents 1999, and so on, fits the data reasonably well.

(a) Based on this model, when did the percent of waste recovered first exceed 25%?

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(b) In what years was it between 26% and 28%?

Municipal Solid Waste Recovered

Source: U.S. Environmental Protection Agency.