Lines c and d are perpendicular. The slope of line c is −1/3. What is the slope of line d?

Answer:
1/3
Step-by-step explanation:
When two lines are perpendicular, it means the lines intersect at a right angle and have opposite reciprocal slopes.The slope of perpendicular lines are the negative reciprocals of each other, and a pair of these lines intersects at 90 degrees.
To figure out d we need to use the formula:
- 1 / m
Plug in:
- 1 / - 1/3
Solve:
1/3
[tex]~~~~~~m_c \times m_d = -1\\\\\implies -\dfrac 13 \times m_d=-1\\\\\implies m_d = 3\\\\\text{The slope of line d is 3.}[/tex]