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Over9000

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over9000 questions thread
« on: March 07, 2009, 01:12:08 pm »
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Ok first question I have is find the image when y= + 2 is translated 5 units in the negative direction of the x-axis and 1 unit in the positive direction of the y-axis then dilated by factor of 2 from the y-axis.
I started by listing the sequence of transformations (x,y) to (x-5, y+1) to (2x-10, y+1).
then x`= 2x-10      y`= y+1
x= and      y= y`-1
then sub into original equation. Is that right so far, sorry I have to ask because its an assignment and I dont know if it is right.
« Last Edit: March 07, 2009, 01:14:36 pm by Over9000 »
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TrueTears

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Re: over9000 questions thread
« Reply #1 on: March 07, 2009, 01:14:29 pm »
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everything is fine up till when you solve for x

its not

everything else and your steps are fine
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Over9000

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Re: over9000 questions thread
« Reply #2 on: March 07, 2009, 01:15:31 pm »
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k thanks man, forgot about the sign
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Re: over9000 questions thread
« Reply #3 on: March 07, 2009, 01:16:54 pm »
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so the new rule would be y= +3, if you subbed everything in?
« Last Edit: March 07, 2009, 01:19:01 pm by Over9000 »
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Re: over9000 questions thread
« Reply #4 on: March 07, 2009, 01:19:54 pm »
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no it would be

maybe you made an arithmetic error somewhere
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Over9000

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Re: over9000 questions thread
« Reply #5 on: March 07, 2009, 01:22:02 pm »
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why is it 4
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Re: over9000 questions thread
« Reply #6 on: March 07, 2009, 01:24:45 pm »
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so after subbing in we have



after you expand the bottom it will be

and you get
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Over9000

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Re: over9000 questions thread
« Reply #7 on: March 07, 2009, 01:27:13 pm »
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thanks, that clears it up, forgot the power
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Re: over9000 questions thread
« Reply #8 on: March 07, 2009, 01:39:48 pm »
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to list an appropriate sequence of transformations that map f(x) = to g(x) =
first make g(x) look like f(x) right and sub y= g(x)
so g(x) becomes
is that right so far?
« Last Edit: March 07, 2009, 01:47:55 pm by Over9000 »
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Re: over9000 questions thread
« Reply #9 on: March 07, 2009, 01:48:14 pm »
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yes thats right.
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Over9000

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Re: over9000 questions thread
« Reply #10 on: March 07, 2009, 01:50:31 pm »
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solve for x and y yeh
so and
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Re: over9000 questions thread
« Reply #11 on: March 07, 2009, 01:51:24 pm »
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so you have to pump out what x`and y`are yeh?
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Re: over9000 questions thread
« Reply #12 on: March 07, 2009, 01:51:40 pm »
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Quote from: Over9000 on March 07, 2009, 01:50:31 pm
solve for x and y yeh
so and

yeah thats right

( i think you meant solve for x' and y' :P)
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Over9000

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Re: over9000 questions thread
« Reply #13 on: March 07, 2009, 01:54:03 pm »
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so i get and
then transformations are
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Re: over9000 questions thread
« Reply #14 on: March 07, 2009, 01:56:22 pm »
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yes thats perfect, although if the question says "list" the transformations, i'd write it out in words like this:

1. translation by 5 units to the negative direction of x axis
2. dilation of factor from the y axis
3. dilation of factor 2 from x axis
4. translation by 7 units in the negative direction of y axis.
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