Concept explainers
Sales of CRT and LCD Screens In 2002, 75 million CRT (cathode ray tube) monitors were sold and 29 million flat LCD (liquid crystal display) monitors were sold. In 2006 the numbers were 45 million for CRT monitors and 88 million for LCD monitors. (Source: International Data Corporation.)
(a) Find a linear function C that models these data for CRT monitors and another linear function L that models these data for LCD monitors. Let x be the year.
(b) Interpret the slopes of the graphs of C and of L. 0
(c) Determine graphically the year when sales of these two types of monitors were equal.
(d) Solve part (c) symbolically.
(e) Solve part (c) numerically.
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