Use the REGRESSION feature on a graphing calculator.
-For some reason the quality of production decreased as the year progressed at a flash drive manufacturing plant. The following data represent the percentage of defective flash drives produced at the plant in the
Corresponding month of the year. Use the regression equation with values rounded to four decimals to predict the percentage of defective drives in month
6, June.
A) 2.0%
B) 2.20%
C) 2.3%
D) 2.15%

Question

Use the REGRESSION feature on a graphing calculator.
-For some reason the quality of production decreased as the year progressed at a flash drive manufacturing plant. The following data represent the percentage of defective flash drives produced at the plant in the
Corresponding month of the year.  Use the regression equation with values rounded to four decimals to predict the percentage of defective drives in month
6, June.
A) 2.0% 
B) 2.20% 
C) 2.3% 
D) 2.15%

Quizplus · Accepted Answer

Using the REGRESSION feature on a graphing calculator, we can input the data and obtain a regression equation. Using this equation, we can input month 6 (June) and get a predicted percentage of defective flash drives. Rounding to four decimal places, the regression equation gives us a predicted percentage of 2.146%. The closest answer choice to this value is D) 2.15%, so that is the best choice. Using the regression feature on a graphing calculator, we can input the data given and get a regression equation. Using this equation, we can plug in the value for month 6 and get the predicted percentage of defective drives. Rounding to four decimals, we get 2.1500%, which corresponds to choice D.

Use the REGRESSION Feature on a Graphing Calculator