Answer
"Continued Line Clan Title"
and
"Dropout Line Clan Title."
Work Step by Step
In the Minitab output with side-by-side bar charts, the "Clan Title" variable is scaled on the horizontal axis, while the variable "Percent" is on the vertical axis.
The first graph refers to a continued line type of clan genealogy, so we could identify this independent qualitative variable as
"Continued Line Clan Title."
Similarly, the second chart would depict the variable
"Dropout Line Clan Title."
