What is the slope of a line that is perpendicular to the line y is equal to negative 1 half x plus 5 ?

The given line is in slope-intercept form, y = mx + b, so its slope is −1/2. A perpendicular line has a slope that is the negative reciprocal: −1 ÷ (−1/2) = 2. Therefore, the slope is 2, choice D.

AI-written and checked against the verified answer.