Which line is perpendicular to the line y =3 x + 3 ?

Question

Which line is perpendicular to the line y =3x+ 3 ?

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Answer 1

Perpendicular lines have slopes that are negative reciprocals of each other.

 

The slope in y = 3x + 3 is 3, so the line perpendicular to it will have a slope of -1/3.

 

The equation for the line with this slope is y = (-1/3) x + b, where b is fitted to pass through a given point.