Explanation:
The condition of perpendicularity of the two lines given by the equations:
is the relation: m₁ x m₂=-1
The equation of the Point-Slope Form is expressed as:
y-y₁=m(x-x₁)
(-2,4) that is x₁=-2 y₁=4
Try the slop formula. x1 - x2 over y1 - y2. Also, try to cross multiply what you already have.
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