A 与 B 成正比或反比用英语怎么说？

A is proportional to B
A is inversely proportional to B

A is in direct ratio to/with B.
A 与 B成正比

A is in inverse ratio to/with B.
A 与 B成反比

相关语法：
成正比，反比

1．…be in direct /inverse ratio to/with 与…成正比/反比

eg. Male illustrations are in direct ratio to /with the advancement of grades, while female illustrations are in inverse ratio.