Per the book "Vinton County, Ohio History and Families" Mahala married Moses Ray on July 4, 1816 in Ross County, Ohio. All their children were born there. They later moved to Missouri and she died in 1830. She is buried in Deepwater, Missouri. 
Mahala Dixon - b. 18 Feb 1800 in Chatham County, North Carolina; d. abt 1830 in Jackson County, Missouri; m. 4 Jul 1816 in Ross County, Ohio, to Moses Ray (son of Thomas Ray and Charity Teague). Six children. 
It may be possible to confirm family relationships with Mahala by comparing test results with other carriers of her mitochondrial DNA.
However, there are no known mtDNA test-takers in her direct maternal line.
It is likely that these autosomal DNA test-takers will share DNA with Mahala: