3Tvwo § 7.5 Functions for parabolas

• Wiskunde
• Middelbare school
• vwo
• Leerjaar 3

§7.5 Functions for parabolas

= Homework for today.

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

 (last lesson).

Question: a. what points do we calculate at 28a? (lollipopsticks)         

                   b. how?    (Next slides gives the answers.)

Answer 28a:

Question: 28b; which points to calculate? (lollipopsticks)

Answers next slide.

finally c; what points to calculate?

 Finally... §7.5

Let's do the Introduction together, first.

We will all think about the answers.

Some of you will get the chance to share your answer(s).

§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...