This lesson contains 17 slides, with interactive quiz and text slides.
Lesson duration is: 50 min
Items in this lesson
What exercises should we discuss on the board?
Slide 1 - Open question
§7.2 Exponential growth
The learning goals are:
+ how to recognise exponential growth
+ how to find the growth factor
Slide 2 - Slide
§7.2 Exponential growth (??!)
Some basic knowledge
about Exponential growth.
After all, that is what this § is about!
Slide 3 - Slide
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 - Slide
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 - Slide
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 - Slide
Slide 7 - Slide
Let's do 13 now.
Open your Notebook and write down your answers in your Notebook.
timer
5:00
Slide 8 - Slide
Let's do 14 now
timer
5:00
Slide 9 - Slide
Let's do 17 now.
Write down your answers in your Notebook.
timer
1:30
Slide 10 - Slide
Suppose the growth factor is 0.87, then there is a decrease.
Slide 11 - Slide
Make question 17c now:
timer
0:45
Slide 12 - Slide
SOLUTION:
Slide 13 - Slide
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 - Slide
Slide 15 - Slide
Finally this important information,
summarising important things from 17, that we just made!
Lesson duration is: 50 min
