Equation Of The Line Page 2

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Find the equation of vertical or horizontal lines
1. All vertical lines are x = __
2. All horizontal lines are y = __
Examples
1. Find the equation of a vertical line through (5,6)
Vertical line crosses the x axis at 5, so all x values will equal 5, therefore the equation is x = 5
2. Find the equation of line parallel to the y-axis through (-2,6)
3. Find the equation of an horizontal line through (-1,8)
4. Find the equation of a line perpendicular to the y-axis through (0,4)

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