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It goes through the point (-3,k) label k on the y axis.
Reply 2
It's a transformation from C1. If y = f(x), what does y = f(x) + k look like?
That's exactly what I'm confused about. I know it moves up the y-axis but there's already a y = 9 from the equation.
Reply 4
Won't the curve, well, just move up?
Reply 5
Put the y value as 9+k ?
Reply 6
how does the 9 come in?
Reply 7
The y intercept occurs when x = 0.

(0 + 3)^2 + k = 9 + k
Keep in mind it won't cross the x-axis no matter what, since k is positive and the square bracket is positive (or 0), so it will look exactly the same for all values of k, just shifted up or down. The two 'points of interest' are the point where it crosses the y-axis and the bottom of the curve. The bottom of the curve is at x=-3, where the bracket is equal to 0, and the curve crosses the y axis at x=0, y=9+K.
Reply 9
:bump:

I know this thread is old but I'm stuck on the same question...
Reply 10
Original post by qewrtyu
:bump:

I know this thread is old but I'm stuck on the same question...


There seems to have been quite a bit of advice posted based on the original request.

Where are you stuck now?

Could you graph y = (x + 3)^2 without the constant k at the end?
Reply 11
Original post by davros
There seems to have been quite a bit of advice posted based on the original request.

Where are you stuck now?

Could you graph y = (x + 3)^2 without the constant k at the end?

Yes but I just don't get what k is :s-smilie:
How am i supposed to draw k
Reply 12
I'm probably just being really stupid :I
Original post by qewrtyu
Yes but I just don't get what k is :s-smilie:
How am i supposed to draw k


You simply draw the curve and then mark k on the scale
Reply 14
Original post by qewrtyu
Yes but I just don't get what k is :s-smilie:
How am i supposed to draw k


It's just any positive constant!

It doesn't affect the shape of the graph, only how far vertically it is translated. So you can draw the general shape of the curve and mark a particular point on the graph where there is a very obvious point where k is involved.
Reply 15
Original post by TenOfThem
You simply draw the curve and then mark k on the scale

Ok so I don't need to work out k or anything
Original post by qewrtyu
Ok so I don't need to work out k or anything


No, you cannot work out k
Reply 17
Original post by TenOfThem
No, you cannot work out k

Oh right thanks. That makes sense. I'll probably be back again...still got more questions to go
Original post by qewrtyu
Oh right thanks. That makes sense. I'll probably be back again...still got more questions to go


:biggrin:
Reply 19
Original post by TenOfThem
:biggrin:

Would rep you but I can't haha