Which table represents a linear function? A two column table with four rows. The first column, x, has the entries, 1, 2, 3, 4. The second column, y, has the entries, 3, 7, 11, 15. A two column table with four rows. The first column, x, has the entries, 1, 2, 3, 4. The second column, y, has the entries, 3, 8, 15, 21. A two column table with four rows. The first column, x, has the entries, 1, 2, 3, 4. The second column, y, has the entries, 3, 9, 3, 9. A two column table with four rows. The first column, x, has the entries, 1, 2, 3, 4. The second column, y, has the entries, 3, 9, 27, 81.