Equations of perpendicular lines

Straight line graphs

Algebra

Know that perpendicular gradients are the negative reciprocals of each other and give the equation of a perpendicular line when provided with either a given graph or equation in the form y=mx+c. (do not need m1 x m2 = -1). Identify perpendicular lines from only their equations by rearranging them in the form y=mx+c
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