2 sentences for 正 (zhèng — positive)

1. 设x为正整数。

   shèx wéi zhèng zhěng​shù.

   Let x be a positive integer.

   Source: Dong Chinese Dictionary

2. 研究发现，收入与教育程度呈正相关。

   yán​jiū fā​xiàn, shōu​rù yǔ jiào​yù chéng​dù chéng zhèng xiāng​guān.

   Research has found that income is positively correlated with educational level.

   Source: Dong Chinese Dictionary