Hydroelectric power is electric power generated by the force of moving water. Figure 1.48 shows the annual percent growth in hydroelectric power consumption by the US industrial sector between 2006 and 2014.

(a) Find the largest time interval over which the percentage growth in the US consumption of hydroelectric power was an increasing function of time. Interpret what increasing means, practically speaking, in this case.

(b) Find the largest time interval over which the actual US consumption of hydroelectric power was a decreasing function of time. Interpret what decreasing means, practically speaking, in this case.

Figure 1.48

Transcribed Image Text:

percent growth over previous year 20 10 -10 -20 2008 2010 2012/ 2014 year