Question

Line a is perpendicular to line b. if the slope of line a is 7 what is the slope of line b

Answer 1

1/7

Explanation:

When 2 lines are perpendicular the gradient of one is the reciprocal of the other :

If the gradient of A was 2 the gradient of B would be 1/2.

If the gradient of a is 7 the gradient of b would be 1/7 .

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