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Q. 2,3, 5?

do you have a graph yet? ... I can get you one !

|dw:1333410736966:dw| yea its like this!

ohh i c :)

so for Q.2 we have to graph the inverse, right?

two lines... f(x)=4x-8 and y=x

umm we have to find inverse first which is x+8/4=y and graphing it gives me |dw:1333411085687:dw|

and ur graph is answer to part 5

umm our teacher tell us that u switch letters first & then solve for y to get the inverse..

do u know how to do Q.3?

I know it like I wrote it !! O_O ... show me your way then!

are you there?

yea

i already told u inverse seems like x+8/4=y

or f^-1(x)

what does it mean to test the symmetry accross the line y=x?

lol okay..

y=f(x)=4x-8
x=4y-8 (switched)
x+8/4=y (solve for y)

the inverse of f(x) is not 1/f(x)

ok I guess I'm wrong, but I want to learn it.. :(

To find the inverse, switch x and y, and write in terms of y.

f(x)=1-x/1+x
x=1-y/1+y
x(1+y)=1-y
x+xy=1-y
y=1-x+xy

y=1-x-xy*

????

with which number do you need help with?

Q.2 a,b

i mean like for a we hv to reflect the graph of f across the diagonal line y=x, how?

draw the y=x line and flip the line over it

I mean, flip it over the line

|dw:1333412317919:dw| like this?

fliping it will be|dw:1333412361021:dw|

Noo... you flip the function f(x) over the line y=x.

so for Q2a we hv to flip over the f(x) ?

or the inverse?

flip f(x) over y=x

ohh okay!

|dw:1333412477378:dw| so its gona be like this?

how about 2b? and question 5 ask the same thing as 2a, right?

noooo
|dw:1333412696801:dw|

question 2 b: get a few points (x,y)
then change them to (y,x) and draw them

and 5 is |dw:1333412939248:dw| ?

Not exactly sure what they mean..

so for 2b i got a graph like this |dw:1333413313588:dw|

... I honestly don't know how you got that. Look at my graph. Thats how f, y=x and f^-1 looks like

that was for f(x) and if I reflect it, i'll get |dw:1333413484096:dw|

with Question 5?