Horizontal and Vertical Graphs

Front

What is the equation of a horizontal line?

Back

y = c, where c is a constant.

Front

What is the equation of a vertical line?

Back

x = c, where c is a constant.

Front

How do you identify a horizontal line on a graph?

Back

A horizontal line runs parallel to the x-axis and has a constant y-value.

Front

How do you identify a vertical line on a graph?

Back

A vertical line runs parallel to the y-axis and has a constant x-value.

Front

What is the slope of a horizontal line?

Back

The slope of a horizontal line is 0.

Front

What is the slope of a vertical line?

Back

The slope of a vertical line is undefined.

Front

If y = 3, what type of line is this?

Back

This is a horizontal line.

Front

If x = -5, what type of line is this?

Back

This is a vertical line.

Front

What does the graph of y = -2 look like?

Back

A horizontal line that crosses the y-axis at -2.

Front

What does the graph of x = 2 look like?

Back

A vertical line that crosses the x-axis at 2.