(a) Sketch the graph of y= - l3x-6l for -1≤x≤5

(b) Using the values of x found in part(a), find the range of values of x for which y<-2

Can u roughly tell me wad to do?? Like sketch the graph of wad first and so on...

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- October 7th 2008, 08:30 PMmaybeline9216Sketching of graphs with modulus functions
(a) Sketch the graph of y= - l3x-6l for -1≤x≤5

(b) Using the values of x found in part(a), find the range of values of x for which y<-2

Can u roughly tell me wad to do?? Like sketch the graph of wad first and so on... - October 7th 2008, 10:23 PMProve It
What does a mod do?

It turns anything negative into a positive (it's an optimist :P).

So draw the graph of y = 3x - 6 over the domain.

Then reflect anything that's below the x-axis about the x-axis (in other words, make everything that's negative into a positive.)

Then you've got the graph of y = |3x - 6|.

Finally, you have to take the negative of this, so reflect the entire graph about the x-axis again.

Then you've got the graph of y = -|3x - 6|.

From your graph you should be able to tell for which values of x you have a y value less than -2.