**Reciprocal**numbers multiply to 1. They are easy to find: Just Flip Them! To find the

**negative reciprocal**, flip the number and then if it's positive make it

**negative**-- and if it's

**negative**make it positive!

What is negative reciprocal slope?

**Negative Reciprocal**.

**Opposite Reciprocal**. The result of taking the

**reciprocal**of a number and then changing the sign. For example, the

**negative reciprocal**of 5 is , and the

**negative reciprocal**of is . Note: Perpendicular lines have

**slopes**that are

**negative reciprocals**of each other.

What is the opposite reciprocal of 3?

First, to be

**opposite**, they must have differing signs. One number should be positive and the other number should be negative. Second, to be reciprocals, one number should be the flipped fraction, or upside down version, of the other number. For example, the**reciprocal**or flipped fraction of**3**/4 is 4/**3**.