Scatterplots Answers

Choose the correct statement about best-fit lines.

The table below shows the approximate percent of students who sent applications to two colleges in various years since 1985. Years Since 1985 0 3 6 9 12 15 Percent 20 18 15 15 14 13 The scatter plot below is a representation of the table of data above. A regression equation for this line is What do the slope and y-intercept indicate?

The following scatter plot shows the billions of dollars spent by travelers in the United States since 1993. Write an equation for the line of best fit and then predict how much money travelers will spend in 2008.

The following table shows the appraised value of a house over time. Age (years) Value (thousands) 0 140 3 148 6 160 9 162 12 185 15 178 18 194 Using the data from the table, choose which set of axes and which set of ordered pairs you would use to plot the data. Graph A Graph B Set A (140, 0), (148, 3), (160, 6), (162, 9), (185, 12), (178, 15), (194, 18) Set B (0, 140), (3, 148), (6, 160), (9, 162), (12, 185), (15, 178), (18, 194)

The table below shows the average SAT math scores from 1993-2002. Year SAT math scores 1993 503 1994 504 1995 506 1996 508 1997 511 1998 512 1999 511 2000 514 Using the data from the table, choose which set of axes and which set of ordered pairs you would use to plot the data. Graph A Graph B Set A (1993, 503), (1994, 504), (1995, 506), (1996, 508), (1997, 511), (1998, 512), (1999, 511), (2000, 514) Set B (503, 1993), (504, 1994), (506, 1995), (508, 1996), (511, 1997), (512, 1998), (511, 1999), (514, 2000)

The table below shows the average SAT math scores from 1993-2002. YearSAT math scores19935031994504199550619965081997511199851219995112000514Using the data from the table determine if there is a linear trend between the year and the average SAT math scores and determine if there is an exact linear fit of the data. Describe the linear trend if there is one.

The table below gives a record of the funds raised by a TV station since its first year of operations. Draw a scatter plot for the data. Year 1 3 5 8 11 14 Contributions ($ thousands) 70,000 150,000 190,000 230,000 270,000 290,000 a. c. b. d. Please select the best answer from the choices provided

A line that is used to represent the linear trend in the data is called the line of best fit. When finding the error of the line of best fit, which statement holds true?

The table below shows the approximate percent of students who sent applications to two colleges in various years since 1985. Years Since 1985 0 3 6 9 12 15 Percent 20 18 15 15 14 13 The scatter plot below is a representation of the table of data above. How well does the line fit the data?

The scatter plot shows the number of milk cow operations in New Mexico from 1975 to 1995. Write an equation for the line of best fit. Then predict the number of milk cow operations in the year 2005.

When data is displayed with a scatter plot, it is often useful to attempt to represent that data with the equation of a straight line. What is this line called and what is its purpose?

The table below shows the amount of money spent on skin diving and scuba equipment in some recent years. Skin Diving and Scuba Equipment Year Sales ($millions) 1993 315 1994 322 1995 328 1996 340 1998 345 1999 363 Let x represent the year and y represent the amount of sales, in millions of dollars, in the regression equation. , Use the regression equation to predict the sales of skin diving and scuba equipment in the year 2008.

The table below shows the scoring averages for the players on the Supersonics intramural basketball team last season. Age of Player Scoring Average 19 2 14 8 16 6 18 10 15 12 10 15.5 17 6 11 4 14 2 Using the data from the table, choose which set of axes and which set of ordered pairs you would use to plot the data. Graph A Graph B Set A (19, 2), (14, 8), (16, 6), (18, 10), (15, 12), (10, 15.5), (17, 6), (11, 4), (14, 2) Set B (2, 19), (8, 14), (6, 16), (10, 18), (12, 15), (15.5, 10), (6, 17), (4, 11), (2, 14)