Characteristics of Lines

Front

What is a vertical line?

Back

A vertical line is a line that goes straight up and down. It has an undefined slope and can be represented by an equation of the form x = a, where 'a' is a constant.

Tags

CCSS.8.EE.B.5

Front

What is a horizontal line?

Back

A horizontal line is a line that goes straight across from left to right. It has a slope of 0 and can be represented by an equation of the form y = b, where 'b' is a constant.

Front

What does the equation x = 4 represent?

Back

It represents a vertical line that crosses the x-axis at the point (4, 0).

Front

What does the equation y = -4 represent?

Back

It represents a horizontal line that crosses the y-axis at the point (0, -4).

Front

How do you find the x-intercept of an equation?

Back

To find the x-intercept, set y = 0 in the equation and solve for x.

Front

Back

The x-intercept is the point (-5, 0).

Front

What is the relationship between the slopes of two perpendicular lines?

Back

The slopes of two perpendicular lines are opposite reciprocals of each other.

Tags

CCSS.8.EE.B.6

Front

What is the slope of a horizontal line?

Back

The slope of a horizontal line is 0.

Tags

CCSS.8.EE.B.5

Front

What is the slope of a vertical line?

Back

The slope of a vertical line is undefined.

Tags

CCSS.8.EE.B.5

Front

If a line has a slope of 2, what is the slope of a line perpendicular to it?

Back

The slope of a line perpendicular to it would be -1/2, which is the opposite reciprocal.

Tags

CCSS.8.EE.B.6