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1TH/Vwo §3.4 Plotting graphs
§3.4 Plotting graphs
You're going to plot a lot of graphs today!
Finally you will exchange your Notebooks and give points for your neighbour's work.
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Wiskunde
Middelbare school
havo, vwo
Leerjaar 1
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§3.4 Plotting graphs
You're going to plot a lot of graphs today!
Finally you will exchange your Notebooks and give points for your neighbour's work.
Slide 1 - Slide
an interesting exercise ...
we will do together right now!
+ take before you:
a. Notebook
b. pen
c. pencil and
d. geo triangle (or ruler), from your bag and pencil case!
Slide 2 - Slide
Schermafbeelding 2020-10-12 om 13.27.34
Slide 3 - Slide
Schermafbeelding 2020-10-12 om 13.27.55
DRAW the HORIZONTAL axis.
USE A PENCIL and a PENCIL ONLY !!! (the numbers and words may be written with a pen)
Look at the lowest age in the table: it is 6 years.
So: start your horizontal axis at 6 years! See next slide.
However:
keep 10 cm open for the VERTICAL axis!
timer
0:45
Slide 4 - Slide
22a Above you see how the HORIZONTAL axis is drawn.
Once more: make sure you have about 10 cm for the VERTICAL axis!
Slide 5 - Slide
Think it over and compare with your neighbour.
timer
0:45
Slide 6 - Slide
Answer 22b:
10 cm (or grids) = put 1 finger up
8 cm = put 2 fingers up
12 cm = put 3 fingers up
Slide 7 - Slide
22b
8 cm (or grids) is the right answer,
because 20 cm is the smallest length and
58 cm is the greatest length.
We use numbers like 20, 25, 30 etcetera.
60 cm is nearest to 58 cm.
Then we need at least: 60 - 20 = 40, 40 : 5 = 8 grids.
Slide 8 - Slide
Let me be honest.....
The answer, given in the previous slide,
was not quite accurate...
In fact you need (at least) 9 cm and not 8 cm.
The cm extra is for a ZIGZAG, that covers 0 cm - 20 cm !
Now we do question 22c!
Slide 9 - Slide
Slide 10 - Slide
like the river in the previous slide .....
our activities keep flowing !
Just go with the flow!
Slide 11 - Slide
S
timer
0:30
Slide 12 - Slide
Answer to 22c:
If you think:
variable= kg and unit = weight, then raise 2 fingers
variable = weight and unit = kg, then raise 4 fingers.
Slide 13 - Slide
Answer and Explanation 22c:
variable = weight
and unit = kg (eenheid),
so 4 FINGERS was correct!
A variable (something that changes over time, in this case weight)
is expressed in a unit (in this case kg)!
Slide 14 - Slide
So go ahead and draw. Don't forget the ZIGZAG for 0 - 20 kg!
timer
0:45
Slide 15 - Slide
In the next slide ....
+ you see the complete graph already
+ but for now it's only about the axes!
Slide 16 - Slide
Slide 17 - Slide
Now do tasks e and f!
Slide 18 - Slide
timer
0:45
Slide 19 - Slide
Slide 20 - Slide
Rounding off this exercise ...
+ Look critically at your neighbour's graph:
+ is it correct and neat (no crossing out)? = 1 point
+ did (s)he use a pencil? = 1 point
+ are the axis drawn as straight lines? = 1 point
+ totalise the points and give back the Notebook
+ if you scored at least 2 points, then the coming JOKE is for you!
Slide 21 - Slide
Slide 22 - Slide
Abov
Above the general way to make a GRAPH from a TABLE is shown!
Next slide gives an example.
Slide 23 - Slide
Slide 24 - Slide
TASK:
In the GRAPH in the following slide
there is something NEW. I've got 2 questions about it:
1st What's new?!
2nd What's the great thing you can READ OFF now?
Discuss this with your neighbour!
Slide 25 - Slide
Slide 26 - Slide
Answer:
1st Two graphs are shown.
2nd The great thing about this is that you can
COMPARE (vergelijken) them!!
Slide 27 - Slide
Homework time
Do:
§3.4 Plotting graphs, you may SKIP 22.
Havo and H/V: choose from support and Standard paths.
Vwo: Why not trying the Challenge path?!
Slide 28 - Slide
Slide 29 - Slide
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