Question

A (-8,-6) b (-2,-6),c (-5,-4) reflection across the line x=1

Answer 1

The distance from
`(h, k)` to
`x=1` is
`1-h`

To reflect across the line, we go twice this distance, which is
`2-2h`

So the new x-coordinate is
`h+(2-2h)=2-h`


`A (-8, -6)` becomes
`A' (2-(-8), -6)=(10, -6)`

`B (-2, -6)` becomes
`B' (2-(-2), -6)=(4, -6)`

`C (-5, -4)` becomes
`C' (2-(-5), -6)=(7, -6)`