I really need help here. . . Please help me! Dejah is proving that perpendicular lines have slopes that are opposite reciprocals. She draws line s and labels two points on the line as (−a, 0) and (0, b).

Enter the answers, in simplest form, in the boxes to complete the proof.

The slope of line s is ?. Rotate line s 90° clockwise about the origin to get line t. The labeled points on line s map to (0, a) and ( ?,? ) on line t. The slope of line t is ??? . The slopes of the lines are opposite reciprocals because the product of the slopes is ???.