1TH/Vwo §3.3 Reading graphs

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• Middelbare school
• havo, vwo
• Leerjaar 1

§3.3 Reading graphs

This paragraph is not that difficult (I think!).

It also doesn't ask that much time from you.

However, §3.2 Working with coordinates,

wasn't that simple!

A good Refresh on this follows now!

That is why .....

 we first look closely at a pretty difficult exercise  

It's very understandable if you did not understand all of it, yet.

 So this is your big chance to catch up!

Part of this exercise we will do together, now.

So, pay attention well!

 

What the writer of the book forgot to mention is what we call the x-axis and the y-axis!

Here it comes:    

(the axes are made longer and they

contain negative numbers too!)      

Question:

Discuss with your neighbour:

What do you have 

to do for this Task?

Extending a line means: making it longer!

Discuss with your neighbour, again

using the sayings in red.        

Try to agree on it!

Then you key in your answer.

Answer this in the Next Slide.

From now on we call this: ANS !

The right point is:

1. (0, 10)
2. (0, 5)
3. (5, 0)
4. (10, 0)

Answer this

question in 

the next slide.

1. (0, 31)
2. (31, 0)

On line RS there is a point that has a first coordinate of 4.

Task: Calculate the 2nd coordinate. Give your answer as a whole number plus a fraction!

ANS !

The 2nd coordinate is ....

Answer:   

4  

​3​​2​​

Before looking at the outcome, let's first 

watch the DIRECTION of the LINE 

through R and S closely!

See next slide.

What does all this mean?!

What does this scheme mean? This:

Watch the ARROWS, that mean moving to the right or up.

+  Going 3 grids to the right, means going up 2 grids, so

+  Going only 1 grid to the right means  going up           grids.

+  Next slide shows how to use this at 10c.

​3​​2​​

ANS 

Again answer with 

a whole number plus a fraction!

The 2nd coordinate is ...

The same kind of task as before!

IN PAIRS:

- Check this by a calculation.

- Try to agree on it.

- One of you answers in the next slide!

??

1. yes, it does
2. no, it doesn't

In the end ...

Something about §3.3!

COPY IN YOUR NOTEBOOK (1):

1.   emptying a sink = legen van een wastafel (exercise 15)

2.  a steeply rising path (exercise 17) - een pad dat steil omhoog gaat

3.  a steep descent - een steile afdaling (exercise 17)

   

Copy in your Notebook (2):

COPY this:

4. relation - verband

5. variable - variabele, bijv. tijd of hoogte

6. unit - eenheid, bijv. seconden of meters

7. the average speed - de gemiddelde snelheid

The 'relation' between time and ice means 

the connection ( verband ) between time and ice. 

Homework time.

Do §3.3 Reading graphs,

Correct your work with the Solutionsbook.