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?

Answer 1

Two points on x=5: (5,1) (5,7)
Two points on y=-2: (1, -2) (8, -2)
Equation of horizontal line through (-1, -8): y=-8
Equation of vertical line through (3,1): x=3
Line with equation x=4: vertical w/ undefined slope
Line with equation y=-8: horizontal w/ slope of 0

Answer 2

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