25. In a total cost function model, a. Materials b. Labor input c. Dummyr d. Production inputs can can be an variables outputs be independent cannot be cannot be dependent variable independent independent variables variables variables 2E. A multiple regression has a. Multiple b. Multiple c. Multiple Multiple intercepts R dependent t values squared van'ables values 30: 1|ultihich of the following statements is true. in a library a. Hewlett- b. Books and c. Dell Interlibrarv Packard joumals computers loans are printers are library are libraryf library are equipment outputs outputs library.r inputs outputs 22. The slope of a simple regression is determined by a. t b. the c. the d. the value coefficient error lntercept term 23. A scholarlyr journal published 4 issues in a year. Now it publishes 6 issues in a year. The economic theory and empirical research show that a. Its b. its c. Its total d. It variable average variable cost cost cost cost decreases decreases has no increases change