Equations of Horizontal and Vertical Lines

This lesson covers equations of horizontal and vertical lines. A horizontal line has an equation where y equals a fixed value, allowing x to vary. Conversely, a vertical line has an equation where x equals a fixed value, allowing y to vary. The lesson explains how these lines are parallel to the respective axes.

What is the main focus of lesson 11?

• Equations of parabolas

• Equations of ellipses

• Equations of all kinds of lines

• Equations of circles

What is the equation of a horizontal line?

• y = x + 1

• x = y

• y = a fixed value

• x = a fixed value

In a horizontal line, which variable can take any value?

• x

• w

• z

• y

What is the equation of the horizontal line given in the example?

• y = 0

• x = 13

• y = 13

• x = 0

Which axis is a horizontal line parallel to?

• z-axis

• x-axis

• w-axis

• y-axis

What is the equation of a vertical line?

• x = a fixed value

• y = a fixed value

• x = y

• y = x + 1

In a vertical line, which variable can take any value?

• x

• z

• y

• w

What is the equation of the vertical line given in the example?

• y = -4

• x = -4

• x = 0

• y = 0

Which axis is a vertical line parallel to?

• z-axis

• y-axis

• w-axis

• x-axis