HELP ASAP!! How did the population of Texas change between 1821 and 1845??

In 1821, the Mexican War for Independence severed the control that Spain had exercised on its North American territories, and the new country of Mexico was formed from much of the lands that had comprised New Spain, including Spanish Texas. The grant was later ratified by the Mexican government. And In 1845 The Texas annexation was the 1845 annexation of the Republic of Texas into the United States of America, which was admitted to the Union as the 28th state on December 29, 1845. The Republic of Texas declared independence from the Republic of Mexico on March 2, 1836.

Explanation: I hope this helps plz tell me if its wrong so i can fix it

the us constitution is a living document, meaning that it can be changed over time as the country changes.