Applying Main Ideas Based on the table, during which year did the number of members in the House of Representatives from both free and slave states decrease? Representation in the House of Representatives, 1800-1850 Number of Members Number of Members Year from Free States from Slave States 1800 76 65 1810 96 79 1820 123 90 1830 141 99 1840 135 88 1850 142 90