What is the slope of a line that is perpendicular to the line x = –3?
The graph of x = -3 is a vertical line passing through -3 on the x-axis.
All vertical lines have slopes that are undefined.
A line perpendicular to a vertical line is a horizontal line. Again, vertical and horizontal lines are perpendicular.
All horizontal lines have slopes that are 0.
The slope of the line that is perpendicular to the vertical line x = -3 would be 0.
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