Horizontal & Vertical Lines

This video tutorial explains the equations of vertical, horizontal, and diagonal lines. It begins with a brief introduction to the axes and the video content. The tutorial then covers vertical lines, where all points share the same X coordinate, and horizontal lines, where all points share the same Y coordinate. It further explains diagonal lines, focusing on y = x and y = -x, where the coordinates have specific relationships. The video concludes by summarizing how to find the equations for these types of lines.

What is the equation of a vertical line where all points have an X-coordinate of 3?

• Y = 0

• X = 0

• Y = 3

• X = 3

If a line has all points with an X-coordinate of -5, what is its equation?

• Y = 5

• X = -5

• X = 5

• Y = -5

What is the equation of a horizontal line where all points have a Y-coordinate of 6?

• X = 0

• Y = 6

• X = 6

• Y = 0

Which equation represents a line where the X and Y coordinates are always equal?

• Y = X - 1

• X = Y + 1

• Y = X

• Y = -X

What is the equation of a line where the Y-coordinate is the negative of the X-coordinate?

• Y = -X

• Y = X + 1

• Y = X

• X = -Y