Use the above scatter plot to decide whether the linear model fits the data well. O The function is not a good model for the data O The function is a good model for the data. Estimate the retails sales in the U. S. in 2015. billions of dollars. (Round to the nearest whole number. Hint: Subtract 2015 - 1995 to find t .) Use the model to predict the year in which retails sales will be $244 billion. |(Round down to state the year. Hint: add t + 1995 to find the year.)

What is the dollar amount of change in sales for each new year according to the regression (slope) model?  Do not use commas or $ in your answer.

Write a function that models the data.

Español Suppose that the credit remaining on a phone card (in dollars) is a linear function of the total calling time (in minutes). When graphed, the function gives a line with a slope of - 0.12. See the figure below. There is $32.40 in credit remaining on the card after 20 minutes of calls. How much credit will there be after 33 minutes of calls? Aa Remaining credit 32.40 ? (in dollars) 20 Calling time (in minutes)

Trust in the Government The percent of people whosay they trust the government in Washington alwaysor most of the time is given by y = 154.131x-0.492,with x equal to the number of years after 1960.a. Graph the function for the years 1960 through2025.b. Does this model indicate that trust in the government is increasing or decreasing?c. Use the graph to estimate the percent of peoplewho trusted the government in 2020.

The table describes the height of a weather balloon, in meters, minutes after its launch. Time (minutes) Height (meters) 0 60 1 68.2 2 74.3 3 80.9 4 89.7 8 128.5 Select which equation best models the data. O O O O y = 8.52 +58 y = 8.2x + 60 y = 11.4x +57 y = 11.8x + 54

How much should a healthy Shetland pony weigh? Let x be the age of the pony (in months), and let y be the average weight of the pony (in kilograms). x 3 6 12 20 26 y 60 95 140 160 189 (a) Make a scatter diagram of the data and visualize the line you think best fits the data.   Flash Player version 10 or higher is required for this question. You can get Flash Player free from Adobe's website.   (b) Would you say the correlation is low, moderate, or strong?  low moderate     strong Would you say the correlation is positive or negative?  positive negative     (c) Use a calculator to verify that          x = 67,           x2 = 1265,           y = 644,           y2 = 93,546,  and          xy = 10,544.  Compute r. (Round your answer to three decimal places.)  As x increases from 3 to 26 months, does the value of r imply that y should tend to increase or decrease? Explain your answer.  Given our value of r, y should…

Since 1992, the value of homes in a neighborhood has doubled every 16 years. The value of one home in the neighborhood was $136,500 in 1992. 1. What is the value of this home, in dollars, in the year 2000? Explain your reasoning. 2. Write an equation that represents the growth in housing value as a function of time in t years since 1992. 3. Write an equation that represents the growth in housing value as a function of time in d decades since 1992. 4. Use one of your equations to find the value of the home, in dollars, 1.5 decades after 1992.