Question

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Answer 1

- 1

Explanation:

The product of the slopes of lines perpendicular to each other is - 1

Given y = 4x - 5 with slope 4

y = -
`(1)/(4)` x - 5 with slope -
`(1)/(4)` then

4 × -
`(1)/(4)` = - 1 proving the lines are perpendicular