20. Done Use for questions 35-36: The average population (in thousands) of a city from 1970 to 1990 can be represented by the function p(r) 0.03-1.5+20+80 where r is the number of years since 1970. What is the instantaneous rate of change in population in 1973? A. 11.810 people/year B. 12,750 people/year C. 14,300 people/year D. 15.960 people/year A O B E: None of the Above

Are one-to-one functions either always increasing or always decreasing? Why or why not?

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?

When examining the formula of a function that is the result of multiple transformations, how can you tell a horizontal shift from a vertical shift?

What is the difference between the input and the output of a function?

A driver of a car stopped at a gas station to fill up his gas tank. He looked at his watch, and the time read exactly 3:40 p.m. At this time, he started pumping gas into the tank. At exactly 3:44, the tank was full and he noticed that he had pumped 10.7 gallons. What is the average rate of flow of the gasoline into the gas tank?

Determine whether Table 1 could represent a function that is linear, exponential, or neither. If it appears to beexponential find a function that passes through the points.

Table 6 shows the population, in thousands, of harbor seals in the Wadden Sea over the years 1997 to 2012. a. Let x represent time in years starting with x=0 for the year 1997. Let y represent the number of seals in thousands. Use logistic regression to fit a model to these data. b. Use the model to predict the seal population for the year 2020. c. To the nearest whole number, what is the limiting value of this model?