Vertical and Horizontal Lines

Front

What is the equation of a horizontal line that passes through the point (x, y)?

Back

y = y-coordinate of the point.

Front

Which type of line runs parallel to the x-axis?

Back

Horizontal line.

Front

What is the equation of the line graphed at y = 1?

Back

y = 1.

Front

Which of the following would be graphed as a horizontal line? y = -4, x = 7, y = 3x-4, None of the above

Back

y = -4.

Front

What type of line has an undefined slope?

Back

Vertical line.

Front

What is the slope of a horizontal line?

Back

0.

Front

What is the slope of a vertical line?

Back

Undefined.

Front

How do you identify a horizontal line on a graph?

Back

It runs left to right and has a constant y-value.

Front

How do you identify a vertical line on a graph?

Back

It runs up and down and has a constant x-value.

Front

What is the general form of the equation for a vertical line?

Back

x = a constant.