3Tvwo § 7.5 Functions for parabolas

§7.5 Functions for parabolas
= Homework for this week.

First let's have a short look back at §7.4
 (last lesson).
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§7.5 Functions for parabolas
= Homework for this week.

First let's have a short look back at §7.4
 (last lesson).

Slide 1 - Diapositive

Question: a. What characteristics can you find from the function                             28a?          
                   

Slide 2 - Diapositive

Question: What charasteristics can you find from the function 28a?

A
p.o.i. y-axis
B
vertex
C
p.o.i. x-axis
D
upward or downward opening parabola

Slide 3 - Quiz

Answer 28a:

Slide 4 - Diapositive

Question: 28b; which points to calculate? 
Answers next slide.

Slide 5 - Diapositive

Question: What charasteristics can you find from the function 28b?

A
p.o.i. y-axis
B
vertex
C
p.o.i. x-axis
D
upward or downward opening parabola

Slide 6 - Quiz

Slide 7 - Diapositive

finally c; what points to calculate?

Slide 8 - Diapositive

Question: What charasteristics can you find from the function 28c?

A
p.o.i. y-axis
B
vertex
C
p.o.i. x-axis
D
upward or downward opening parabola

Slide 9 - Quiz

Slide 10 - Diapositive

 Finally... §7.5
Let's do the Introduction together, first. p.252
Write down the correct answers.
Make a picture and hand in. 

Slide 11 - Diapositive

Slide 12 - Diapositive

Picture of the introduction answers

Slide 13 - Question ouverte

§7.5 is the Reverse of §7.4
Question: Why?
Answer: In §7.4 you were given a Formula and you had to make (a sketch of) the Graph.
In §7.5 however you get a Graph and make the Formula!

Slide 14 - Diapositive

Homework time.
Start doing §7.5!
-later we continue this LessonUp-

Slide 15 - Diapositive

Final part LessonUp
Question: Where in this book can you find an explanation how to do 30d: 
working out Simultaneous Equations?
Key in your answer on the next slide!

Slide 16 - Diapositive

Where in the book???
Simultaneous Equations...

Slide 17 - Carte mentale

Answer(s):
p.234 R1, but also:
p.20, § 1.3

Slide 18 - Diapositive

The Method on p.253
- gives you good information
- however, it is a lot of text in little space...
- we might easily get overloaded, so
- let's bite off small pieces that we can chew!

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An introduction to  31:
Try to find the right Formula Form, to use for 31a, see next slide.
So, only the FORM!

Slide 25 - Diapositive

Slide 26 - Diapositive

answer to 31, the first graph:

Slide 27 - Diapositive

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answer to 31, the 2nd:

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answer to 31, the 3rd:

Slide 31 - Diapositive

Homework time again, but remember...

Slide 32 - Diapositive