Straight line AB is perpendicular to the straight line joining p(-6,-9) and Q(3,-12). Find the gradient of AB *i need help*π_π *is the answer in the picture correct? *

Straight line AB is perpendicular to the straight line joining p(-6,-9) and Q(3,-12). Find the gradient of AB

*i need help*π_π
*is the answer in the picture correct? *

Straight line AB is perpendicular to the straight line joining p(-6,-9) and Q(3,-12). Find-example-1

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Straight line AB is perpendicular to the straight line joining p(-6,-9) and Q(3,-12). Find the gradient of AB i need helpπ_π is the answer in the picture correct?

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Straight line AB is perpendicular to the straight line joining p(-6,-9) and Q(3,-12). Find the gradient of AB *i need help*π_π *is the answer in the picture correct? *​

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Straight line AB is perpendicular to the straight line joining p(-6,-9) and Q(3,-12). Find the gradient of AB i need helpπ_π is the answer in the picture correct?