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%?

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.

Use the graph to estimate the average rate of change of the percentage of new employees from 1994 to​ 2000, from 2000 to​ 2006, and from 1994 to 2006.

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

A model fit predicting preference for President (Democrat, Republican, Independent) using x = annual income (in $10,000 dollars) is log(pid/pii) =3.3− 0.2x and log(pir/pii) = 1.0 + 0.3x. State the prediction equation for log(pir/pid). Interpret its slope. Find the range of x for which pir >pid . State the prediction equation for pii.

The graph on the right shows the remaining life expectancy, E, in years for females of age x. Find the average rate of change between the ages of 50 and 60. Describe what the average rate of change means in this situation. Life Expectancy in years 60- 40- 20- 0 20 CITR (40 39.9) 40 (50 29.8) (60 20.4) 60 (70 12.5) 80 The average rate of change of life expectancy between the ages of 50 and 60 is (Type an integer or a decimal.) X Q Q G

Suppose a new drug is intended to improve walking distance in patients with Parkinson Disease A researcher measures patients walking distance in feet before and after trying the drug for 9 weeks. What is the value of t obs