1TTO §7.4 Making formulas for graphs

§7.4 Making formulas for graphs
This subject, MAKING them yourself, is sometimes found the most difficult from the whole chapter.
However the book gives us a clear strategy how to do this.
First of all: straight lines ->  y = 0x + 3   

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§7.4 Making formulas for graphs
This subject, MAKING them yourself, is sometimes found the most difficult from the whole chapter.
However the book gives us a clear strategy how to do this.
First of all: straight lines ->  y = 0x + 3   

Slide 1 - Tekstslide

Dagopening?
Start right here
Gebed
Bijbelstukje

Slide 2 - Tekstslide

§7.4 Making formulas for graphs
This subject, MAKING them yourself, is sometimes found the most difficult from the whole chapter.
However the book gives us a clear strategy how to do this.
So pay attention well!

Slide 3 - Tekstslide

First of all...
Take the usual materials before you:
+ Notebook, Textbook
+ Pen, pencil, geo triangle
+ Because we are going to do the first homework exercise 25, p.218 now!

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Exercise 25, p.218 we make together, now.
+ Think hard about every question.
+ Everyone may get the turn to give the answer.
+ Write down the correct result in your Notebook. 

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8

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By chance is decided who gives the answer
to this question.
Finally we all write down the correct answer.

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answer to 25a:
The graph starts at (0,0)  or  the origin.
(That's the same.)

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answer 25b:

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At question c, 
a short Calculation is needed!
So, ..........., tell us how to calculate
the answer.

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answer 25c:

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Now question d.
Use the answer(s) we already have.
......., what is your answer?

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answer 25d:
The formula becomes:
'length x 0.80 = price'
So ' 0.80 ' had to be filled in.

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Suppose you don't have any start of a Formula.
You only have a Graph.
How to make the Formula now? See next slides.

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Exercise 28 ......
+  You're going to do right now, in your Notebook
+  Keep the Textbook, p.218/219 opened,
+  for following the 4 steps Method, we just discussed.
+  So write down all 4 steps, not just the answer! 
timer
5:00

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+ here's the exercise, 
 that is also in your book, 
 of course.

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Solution 28a:
Compare to your own work and if needed, add or correct!

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Homework time, doing §7.4.

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Part 2 making formulas

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S28

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4 Stappen:
1. maak tabel

2. zoek startgetal

3. zoek stijging PER-getal (dus wat gebeurt er als op horizontale as +1 gaat?

4. formule ->   verticaal  =  .........X horizontaal (+ startgetal)

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Tekst

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