Question

An image point has coordinates B'(7-4). Find the coordinates of its pre-image if the translation used was (x + 4, y + 5).B(11, 1)B(3,1)B(3,-9)B(11,-9)

Answer 1

For this problem we know that the image point has a coordinate sof:

`B=(7,-4)`

And we know that the translation used was

`(x+4,y+5)`

And for this case we can do this:

`x+4=7\rightarrow x=7-4=3`
`y+5=-4\rightarrow y=-4-5=-9`

And then the best solution for this case would be:

B(3,-9)