Give the coordinates of two points on the line x = 5.
Give the coordinates of two points on the line y = -2.
Write the equation of the horizontal line passing through the point (-1, -8).
Write the equation of the vertical line passing through the point (3, 1).
Is the line with equation x = 4 horizontal or vertical? What is the slope of this line?
Is the line with equation y = -8 horizontal or vertical? What is the slope of this line?

Question

Give the coordinates of two points on the line x = 5.
Give the coordinates of two points on the line y = -2.
Write the equation of the horizontal line passing through the point (-1, -8).
Write the equation of the vertical line passing through the point (3, 1).
Is the line with equation x = 4 horizontal or vertical? What is the slope of this line?
Is the line with equation y = -8 horizontal or vertical? What is the slope of this line?

mathmale · Answer

1)  If we're dealing with the (vertical) line x = 5, then any point on that line has x-coordinate 5.  Choice of y-coordinate is thus arbitrary.  For example:  (5, 10) and (5, -13).
(2) Same concept, different variable.  You try it.
(3) Think:  What is the SLOPE of a horizontal line?
(4) What is the slope of a vertical line, if any?
(5) Try graphing x=4 before attempting to answer this question.

anonymous · Answer

I don't understand it at all, that is all of the information that is provided.