Unit Test — Unit test Answers

Make a scatter plot of the data below. x y 25 150 50 178 75 216 100 265 125 323 150 392 175 470.4 Using the quadratic regression equation predict what the y-value will be if the x-value is 200. a. y = 83.5 b. y = 346.9 c. y = 238.1 d. y = 555.5 Please select the best answer from the choices provided

Solve the following equation algebraically: a. b. c. d. Please select the best answer from the choices provided

The number of VHS movie rentals has declined since the year 2000 due to the popularity of DVDs, as the following table shows. Use a graphing calculator to determine the exponential regression equation that best fits the VHS rental data. Let x represent the number of years since 2000. Year 2000 2001 2002 2003 2004 2005 2006 VHS Rentals (in millions) 10.5 7.8 6.3 5.1 4.4 3.6 3.1 a. y = 9.75(0.08197)x c. y = 9.87(0.8213)x b. y = 10.50(0.08217)x d. y = 10.50(0.80662)x Please select the best answer from the choices provided

What is the relation between the variables in the equation ?a.y varies directly as xc.y varies jointly as xb.y varies inversely as xd.none of the above

The table of values below represent an exponential function. Write an exponential equation that models the data. x y -2 23 -1 16.1 0 11.27 1 7.889 2 5.5223 a. c. b. d. Please select the best answer from the choices provided