Question

[fredrick]

When they say scale factor of 2 from the x-axis that means all the y-values are doubled and when they say scale factor of 2 along( or parallel or in the direction of) the x-axis that means the x value are doubled. always confusing

[bucket]

gah im still getting confused

[Toothpaste]

dilation factor of ______
from the x axis = parallel to the y axis
from the y axis = parallel to the x axis

along = parallel .. I always thought.

[ell]

Just imagine it as if you were walking on the Cartesian plane - "from the x-axis", you'd be walking away (when scale factor > 1) or towards the x-axis (when scale factor < 1), which means you're going up or down (parallel) to the y-axis.

From there it's easy to see what you need to do to the ordinate, walking away from the x-axis means my y-ordinates are getting bigger, and vice versa.

[shinny]

What variations for phrasing have you guys seen for reflections? Just making sure there aren't any that I can't interpret <_< Only ones I can think of right now are 'across the x/y axis' and 'in the x/y axis' (which mean the same thing yes?)

[Toothpaste]

What variations for phrasing have you guys seen for reflections? Just making sure there aren't any that I can't interpret <_< Only ones I can think of right now are 'across the x/y axis' and 'in the x/y axis' (which mean the same thing yes?)

ABOUT/OVER the x/y axis





...

[shinny]

And they all mean the same thing right?

[Toothpaste]

And they all mean the same thing right?

Yes. I would say so.

Just flipping through my old methods stuff, I can't find anything overly trivial in wording yet...

[Mao]

along x axis = in the x direction = parallel to the x axis = from the y axis

now swap x and y.

[that's what my notes said]

[bucket]

So,
Dilation of 2 to the x axis = twice the value of y for every x value? ie. (1,1) becomes (1,2)?
then Dilation of 2 to the y axis = twice the value of x for every y value? ie. (1,1) becomes (2,1)?

[shinny]

'to' the x/y-axis is kinda ambiguous o_o Don't think I've ever seen that wording before...But if I ever did, then yeh, I'd say what you had...