# When the slope is 0?

The

**slope**of a horizontal line. A horizontal line has**slope 0**because all its points have the same y-coordinate. As a result, the formula used for**slope**evaluates to**0**.A.

### Can a slope be zero?

Since we did not have a change in the x values, the denominator of our

**slope**became**0**. This means that we have an undefined**slope**. If you were to graph the line, it would be a vertical line, as shown above.#### What is the definition of zero slope?

A**zero slope**is just the**slope**of a horizontal line! The y-coordinate never changes no matter what the x-coordinate is! In this tutorial, learn about the meaning of**zero slope**.#### Can you have a negative slope?

**Negative Slope**. If a line has a positive**slope**(i.e. m > 0), then y always increases when x increases and y always decreases when x decreases. Thus, the graph of the line starts at the bottom left and goes towards the top right.#### What does a line with a slope of zero look like?

When the 'rise' is**zero**, then the line is horizontal, or flat, and the**slope**of the line is**zero**. Put simply, a**zero slope**is perfectly flat in the horizontal direction. The equation of a line with**zero slope**will not have an x in it. It will**look like**'y = something.'

Updated: 2nd October 2019