# Slope of horizontal and vertical lines

## Interactive practice questions

Which of the following statements is correct for vertical lines?

A vertical line's slope is very large because it is so steep

A

A vertical line has a slope that is undefined because, when calculating the slope using the formula $\frac{\text{rise }}{\text{run }}$rise run , the run is $0$0 and it is not possible to divide a number by $0$0

B

A vertical line's slope is equal to $0$0 because when calculating the slope using the formula $\frac{\text{rise }}{\text{run }}$rise run , the run is $0$0

C

A vertical line's slope is very large because it is so steep

A

A vertical line has a slope that is undefined because, when calculating the slope using the formula $\frac{\text{rise }}{\text{run }}$rise run , the run is $0$0 and it is not possible to divide a number by $0$0

B

A vertical line's slope is equal to $0$0 because when calculating the slope using the formula $\frac{\text{rise }}{\text{run }}$rise run , the run is $0$0

C
Easy
Less than a minute

What does it mean if the slope of a line is zero? Select all that apply.

What does it mean if the slope of a line is undefined? Select all that apply.

Find the slope of the line.

### Outcomes

#### 9D.AG2.01

Determine, through investigation, various formulas for the slope of a line segment or to determine the slope of a line segment or a line