Answer
The increase in the number of plants shipped from January 2013 to June 2013 was $5,000$.
Work Step by Step
The given graph shows the following information:
The number of plants shipped in January 2013 was 4,000.
The number of plants shipped in June 2013 was 9,000.
Thus, the increase in the number of plants shipped from January 2013 to June 2013 was :
$=9000 - 4000
\\=5000$