3Tvwo § 7.5 Functions for parabolas

• Wiskunde
• Middelbare school
• vwo
• Leerjaar 3

§7.5 Functions for parabolas

= Homework for this week.

First let's have a short look back at §7.4

 (last lesson).

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

                   

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

1. p.o.i. y-axis
2. vertex
3. p.o.i. x-axis
4. upward or downward opening parabola

Answer 28a:

Question: 28b; which points to calculate? 

Answers next slide.

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

1. p.o.i. y-axis
2. vertex
3. p.o.i. x-axis
4. upward or downward opening parabola

finally c; what points to calculate?

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

1. p.o.i. y-axis
2. vertex
3. p.o.i. x-axis
4. upward or downward opening parabola

 Finally... §7.5

Let's do the Introduction together, first. p.252

Write down the correct answers.

Make a picture and hand in. 

Picture of the introduction answers

§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!

Homework time.

Start doing §7.5!

-later we continue this LessonUp-

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!

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

Answer(s):

p.234 R1, but also:

p.20, § 1.3

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!

An introduction to  31:

Try to find the right Formula Form, to use for 31a, see next slide.

So, only the FORM!

answer to 31, the first graph:

answer to 31, the 2nd:

answer to 31, the 3rd:

Homework time again, but remember...