Question

What is the slope of line perpendicular to y = -3x + 7?

• A. -1/3
• B. 3
• C. 1/3
• D. -3

Answer 1

Answer:

C. 1/3

The given line is:

y=-3x+7

Its slope is (-3).

For two perpendicular lines, their slopes are negative reciprocals of each other.

So if the original slope is (-3), the perpendicular slope is:

$m_\perp=-\frac{1}{-3}=\frac{1}{3}$

Answer:

$\boxed{\frac{1}{3}}$