Identifying Types of Lines

Front

What is a vertical line?

Back

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

Front

What is a horizontal line?

Back

A horizontal line is a straight line that goes left and right. It has 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 passes through the point (4, y) for all values of y.

Front

What does the equation y = -3 represent?

Back

It represents a horizontal line that passes through the point (x, -3) for all values of x.

Front

What is the equation of a horizontal line that passes through y = 3?

Back

The equation is y = 3.

Front

What is the equation of a vertical line that passes through x = -4?

Back

The equation is x = -4.

Front

What type of line is represented by the equation y = 2x + 1?

Back

It is a slanted line (not vertical or horizontal) with a slope of 2.

Front

How can you identify a vertical line on a graph?

Back

A vertical line will have all points with the same x-coordinate.

Front

How can you identify a horizontal line on a graph?

Back

A horizontal line will have all points with the same y-coordinate.

Front

What is the slope of a vertical line?

Back

The slope of a vertical line is undefined.