1. Give examples of variables with positive and negative relationships 2. The company manager wants to know whether there is a relationship between the price of goods and the number of goods sold. For this purpose he takes price and sales data from the past 5 months as follows: Price (X) 10 6 4 6 2 Sales (Y) 25 40 70 55 75 Calculate the correlation coefficient and the coefficient of determination as well as the regression equation. Explain the meaning of the coefficient values and the regression equation