4 keys to mastering dilations from the y-axis

Tricky tricky tricky…

Perhaps this little summary will help clear up the confusion about when to use the reciprocal and when not. Click on the link below to download your own copy to add to your summary notes. Be aware the ‘opposite’ is also readily tested: you might be told that a functions has been dilated by a factor of 3 from the y-axis, and you’ll need to know what to write/how to modify the equation. For the record – it needs to read as f(1/3x), i.e. write a 1/3 in the equation beside the x.


Click here to download your own printable version: Dilations from the y-axis.jpg (313 KB)