The table shown gives the national average pupilteacher ratio in public schools over selected years. a. Find the equation for the least squares line. Let x correspond to the number of years since 1992 and let v correspond to the average number of pupils per'l teacher. b. Use the answer from part (a) to predict the pupil-teacher ratio in 2020. Does this seem realistic? c. Calculate and interpret the correlation coefficient. a. The equation for the least squares line is 'r' = D. (Use integers or decimals for any numbers in the equation. Round to four decimal places as needed.) b. Using the answer from part (a), the pupil-teacher ratio in 2020 will be |:|. (Round to one decimal place as needed.) Does this seem realistic\"? {.1 No {.1 Yes G. Select the correct choice below and fill in the answer box to complete your choice. (Type an integer or decimal rounded to four decimal places as needed.) i." A- The correlation coefficient is . which indicates a strong linear correlation. '5' B- The correlation coefficient is . which indicates thatthere is no linear correlation. A simplified economy involvesjust three commodity :ind the input-output matrix. A. and the categories agriculture, manufacturing, demand matrix, D, for this economy. and transportation. all in appropriate units. Production oft unit of agriculture requires HZ unit of manufacturing and The input-output matrix is :l. l.-'5 unit of transportation; production of 1 unit of (Type an integer or fraction for each manufacturing requires 135 unit of agriculture and 135 unit matrix element.) of transportation; and production oft unit of transportation requires 1M unit of agriculture and 1.i'5 unit of The demand matrix is |:. manufacturing. lfthe demand is 601 units of (Type an integer or fraction for each each commodity. how many units of each commodity matrix element.) should be produced? About I: units of agriculture. :l units of manufacturing. and El units of transportation || should be produced. (Round to the nearest whole number as needed.)