The expression -1/m represents the negative reciprocal of a variable m. In mathematics, the reciprocal of a number is obtained by dividing 1 by that number. Therefore, -1/m indicates that you take the reciprocal of m and then apply a negative sign to it. This is often used in algebra and calculus, particularly when dealing with slopes of lines or rates of change. When m is a non-zero value, -1/m will yield a real number. If m is positive, -1/m will be negative, and if m is negative, -1/m will be positive. This relationship is important in various fields, including physics and engineering, where understanding the behavior of variables is crucial for problem-solving.