Scripture informs prayer: Absolutely true. When our prayers are guided by Scripture, we pray according to His infallible revelation.

Prayer informs scripture: If the intended meaning is to say that scripture cannot be understood without the illumination of the Holy Spirit, sought by prayerful reading and study, then I agree. If it is intended to imply that prayer "informs" scripture in any other sense, I would have to sharply disagree.

-Robin