Question

a straight line passes through the point P(-1,5). Another line which passes through Q(-4,4) intersects the first line at point R( µ,5) where µ is a constant . If <PRQ = 90° find the value of R​

Answer 1

`\mu=-4`

Explanation:

We know that
`\overline{PR} \perp \overline{QR}`.

Since
`\overline{PR}` is horizontal,
`\overline{QR}` is vertical. Therefore,
`\mu=-4`.