Cette leçon contient 17 diapositives, avec quiz interactif et diapositives de texte.
La durée de la leçon est: 50 min
Éléments de cette leçon
What exercises should we discuss on the board?
Slide 1 - Question ouverte
§7.2 Exponential growth
The learning goals are:
+ how to recognise exponential growth
+ how to find the growth factor
Slide 2 - Diapositive
§7.2 Exponential growth (??!)
Some basic knowledge
about Exponential growth.
After all, that is what this § is about!
Slide 3 - Diapositive
Exponential growth
If you multiply a number by the same factor, every time, for the same increase in units of time, we say there is exponential growth.
If there is exponential growth, we call the factor you multiply by, the growth factor.
Example: The number of bacteria increases by 50% every day.
Slide 4 - Diapositive
Exponential growth
If there is exponential growth, we call the factor you multiply by, the growth factor.
We even call it this, if the factor you multiply by is between 0 and 1 (so a decrease !).
Example: The number of trees decrease bij 20% every year --> New amount is 80.
Slide 5 - Diapositive
Exponential growth
To check IF a table or graph corresponds to exponential growth, you have to calculate the growth factor for each pair of consecutive amounts. Because amounts are often rounded off, the growth factor is only approximately the same every time.
Now follows
a slide
on personal
growth!
Slide 6 - Diapositive
Slide 7 - Diapositive
Let's do 13 now.
Open your Notebook and write down your answers in your Notebook.
timer
5:00
Slide 8 - Diapositive
Let's do 14 now
timer
5:00
Slide 9 - Diapositive
Let's do 17 now.
Write down your answers in your Notebook.
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1:30
Slide 10 - Diapositive
Suppose the growth factor is 0.87, then there is a decrease.
Slide 11 - Diapositive
Make question 17c now:
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0:45
Slide 12 - Diapositive
SOLUTION:
Slide 13 - Diapositive
Task:
Now do 'd', using your Calculator.
FIVE calculations are asked from you!
Write them all down in your Notebook.
Finally COMPARE the five answers and draw a CONCLUSION.
timer
2:00
Slide 14 - Diapositive
Slide 15 - Diapositive
Finally this important information,
summarising important things from 17, that we just made!
La durée de la leçon est: 50 min
