The accompanying table shows the net sales (in billions of dollars), total assets (in billions of dollars), and shareholder's equities (in billions of dollars) for a company for five years.

(A) Calculate r2adj and (B) determine the percentage of the variation in y that can be explained by the relationships between variables according to r2adj. Compare this result with the one obtained using r squared 2.

Shareholder's equity, y, 61.5, 63.7, 68.4, 67.2, 70.3.

Net sales, x₁, 369.4, 398.7, 402.8, 413.2, 439.8

Total assets, x_2, 156.5, 158.7, 167.9, 178.3, 189.1