What is the slide positions for amazing grace on trombone?

For "Amazing Grace," the slide positions on Trombone typically start with the notes of the melody in the following positions: B♭ (1st position), C (4th position), D (3rd position), E♭ (1st position), F (1st position), G (4th position), A (3rd position), and B♭ (1st position) again. Depending on the arrangement, you might also encounter variations in slide positions, but these are the common ones for the primary melody. Be sure to check the specific sheet music you are using, as it may have specific notations.