what is the slope of a line perpendicular to the line with equation y 4x 5

what is the slope of a line perpendicular to the line with equation y 4x 5

what is the slope of a line perpendicular to the line with equation y 4x 5. There are any references about what is the slope of a line perpendicular to the line with equation y 4x 5 in here. you can look below.

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