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# Translations help Watch

1. HI

I get that it is a stretch in x direction but i don't understand how you work out the scale factor?
Any help?
Many thanks
2. (Original post by pygmypossum)
HI

I get that it is a stretch in x direction but i don't understand how you work out the scale factor?
Any help?
Many thanks
If you call the first one then you should spot the second one is . Can you see why this is true?

The transformation is a stretch scale factor parallel to the x-axis.
3. (Original post by Zacken)
If you call the first one then you should spot the second one is . Can you see why this is true?

The transformation is a stretch scale factor parallel to the x-axis.
No sorry I don't understand how its (2x)??
4. (Original post by pygmypossum)
No sorry I don't understand how its (2x)??
If you have then if you replace all the x's with 2x you get , which is precisely the second function you have.
5. (Original post by Zacken)
If you have then if you replace all the x's with 2x you get , which is precisely the second function you have.
Ah that makes sense! So is the answer 1/2?
6. (Original post by pygmypossum)
Ah that makes sense! So is the answer 1/2?
Yeah.
7. (Original post by Zacken)
Yeah.
Thank you!
8. (Original post by pygmypossum)
Thank you!
No problem. :-)

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