multiple can be true

A cost accountant wants to study the cost behavior of financial information and performs a regression analysis on 12 months of data. The dependent variable is overhead costs and the independent variable is machine hours. The co-efficient of determination is 0.83. Which of the following is true? 1. Machine hours and overhead costs are negatively correlated. II. The coefficient of correlation is approximately 91% III. Machine hours account for about 61% of the variation in overhead costs. IV. Factors other than machine hours account for about 17% of the variation in overhead costs V. The regression shows a weak correlation between machine hours and overhead costs