Recovery of Solid Waste The percent W of municipal solid waste recovered i...

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

W = 0.68x + 30.6,

where x = 1 represents 2004, x = 2 represents 2005, and so on, fits the data reasonably well.

(a) Based on this model, when did the percent of waste recovered first exceed 32%?

(b) In what years was it between 33% and 34%?