Speed (m/s) 20- 2 3 10 100 Time (seconds) NOT TO SCALE 130 The speed-time graph shows information about the journey of a tram between two stations. (b) Calculate the average speed of the tram for the whole journey. AVERAGE SPEED TOTAL DISTANCE Time 2200⋆ 1305 16.9% 16.9

Farms in the United States The graph gives the number of farms in the United States from 1850 to 2000. aEstimate the average rate of change in the number of farms between i 1860 and 1890 and ii 1950 and 1970. bIn which decade did the number of farms experience the greatest average rate of decline?

DVD Player sales The table shows the number of DVD play-ers sold in a small electronics store in the years 2003-2013. What was the average rate of change of sales between 2003 and 2013? Whatwas the average rate of change of sales between 2003 and 2004? What was the average rate of change of sales between 2004 and 2005? Between which two successive years did DVD player sales increase most quickly?

The U.S. Census tracks the percentage of persons 25 years or older who are college graduates. That data forseveral years is given in Table 4[14]. Determine whether the trend appears linear. If so, and assuming the trendcontinues. in what year will the percentage exceed 35%?

Month September October November KWPH 115 151 164 Consumption (K) Amount Due 1,216.85 1,697.22 1,903.84 Based on the table, what is the constant variation (K)?

Time (secs) 0 30 60 90 120 150 180 Speed (mi/secs) 0.00 0.03 0.08 0.16 0.27 0.42 0.65 9. The table above gives the speeds, in miles per second, at various times for a test rocket that was fired upward from the surface of Earth. Use the values in the table to give a lower and upper estimate of the number of miles traveled during the first 180 seconds.

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The saturation concentration of oxygen dissolved in water is a function of temperature and chlorine concentration as given in the table. For T=18°C and chlorine concentration =10,000mgL/, calculate the dissolved oxygen level by sequential interpolation. Temperature°C Chlorine= 0 mg/L Chlorine= 10,000 mg/L Chlorine 20,000 mg/L 12.8 11.6 10.5 10 11.3 10.3 9.2 15 10.0 9.1 8.2 20 9.0 8.2 7.4 25 8.2 7.4 6.7 30 7.4 6.8 6.1

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the rule of the function   y=1600 (½ )^x   it gets half of the remaining samples every month. What type of function is this one??