Posted by **pinkpolkadots7** on Tuesday, November 14, 2006 at 5:11pm.

Explain why the slope of a horizontal line is zero, and the slope of a vertical line is undefined.

The slope is the tangent of the enclosed angle. Tan = vertical side divided by horizontal side. With a horizontal line, the verticle side is zero and zero/any number is zero.

For the vertical line, the horizontal side is missing (zero) and any number divided by zero is undefined.

## Answer this Question

## Related Questions

- Math...Please help I need this done by 6:00 - This was the question: Explain why...
- math - This was the question: Explain why the formula for determining slope ...
- Math /Algebra - I was challenged with this question: Explain why the formula for...
- math - This was the question : Explain why the formula for determining slope ...
- math /algebra - This was the : Explain why the formula for determining slope ...
- Math - Finding the slope and y-intercept for x = -9, I beleive is (-9, 0) and ...
- Algebra1 - Complete this sentence with the correct choice: y = 4 is a horizontal...
- algebra - Write the equation of the line with x-intercept (–8, 0) and undefined ...
- math/algebra1a - write the equation of the line with x-intercept (-7, 0) na d ...
- math - 1. What is the slope of the line that passes through the points (-2, 5) ...

More Related Questions