So here's is your assignment tonight.
Post a comment showing that you visited the blog tonight. Extra credit if you post a brief review of what you learned about expansions and compressions today. Taking the time to put your thoughts into words will help crystallize what you really understand and will help me figure out where I need to spend my time supporting you. Also, see if you can answer this question.
See you tomorrow.
Oh and by the way, feel free to contact a friend and let them know about this extra credit opportunity!!! What goes around comes around. :-)
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6 comments:
well today i learned all about the stretches and compressions. I learned that they can be stretched or compressed vertically or horizontally... and that the spots on the x are invariant... i found the difference between horizontal and vertical compressions/stretches somewhat confusing.
Thanks Andrew
It is important to remember that the points on the X axis are invariant for vertical expansions and compressions but it is the points on the Y axis that are invariant for horizontal expansions and compressions.
stretches and compressions can be both horizantal and vertial, in the equation y=a(bx)a would affect the vertical and b would affect the horizontal
So i'm not sure if it's too late now that it's the next day but....
I learned that based on the equation f(x)= a(bx)
"A" affects the vertical compression or expansion, when "a" is affected the points on the x-axis do not change
"B" affects the horizontal compression and expansions, when "b" is affected the points on the y-axis do not change.
Negatives in both "a" or "b" make the equation reflect over the axis in which it affects ("a" flips over the x-axis, and "b" over the y)
Good work folks. Let's fine tune the presentation of the function to read y = af(kx)
Well, to tell you the truth, I'm still stuck in 1.3 I am having complications with pg 25 1.3 #28 b I don't really understand how to graph them. I am just quite cofused. The stuff we learnt today about horisontal and vertical compression and expansion, and reflections easier than I thought it would be but I still have to remember which does which because I get them mixed up sometimes. One part i thought was hard was when you had to compress it and expaned it. see you tomorrow.
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