3THavo § 7.3 Fractional formulas

§ 7.3 Fractional formulas
First we shortly look back at 
+  § 7.1   and
+  § 7.2
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Slide 1: Tekstslide
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In deze les zitten 17 slides, met interactieve quiz en tekstslides.

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§ 7.3 Fractional formulas
First we shortly look back at 
+  § 7.1   and
+  § 7.2

Slide 1 - Tekstslide

Question 1
Calculate y = -3p2   for p = -4
For all questions do as follows:
+ Work it out on scrap paper and
+ Show your answer on the Mini White Board
+ Only when I say so, not earlier!

Slide 2 - Tekstslide

Answer 1
y = -3p2  for  p = -4
y = -3 x (-4)2 = -3 x 16 = -48

Slide 3 - Tekstslide

Question 2
Find out on your scrap paper, 
if there is a quadratic relation in this table:



Slide 4 - Tekstslide

Answer 2

Slide 5 - Tekstslide

Question 3
1. Are x and y directly proportional?
2. If so, what is the constant of proportionality?
3. Make the formula for this table.

Slide 6 - Tekstslide

Answer 3
1.        Yes, because if you do x times a certain number, then
            y is multiplied by that same number.
2.        The constant of proportionality is 3.
3.         y = 3x

Slide 7 - Tekstslide

Question 4
1. Is this table inverse proportional?
2. If so, make the formula.

Slide 8 - Tekstslide

Answer 4
1. Yes!
2.  There are 3 possibilities:
a.        x times y = 100   (I write 'times' to distinguish from letter x)
b.        y = 100/x    or
c.      x = 100/y

Slide 9 - Tekstslide

Time for § 7.3 = Homework
Fractional formulas, it is about.
You will notice that the variables in these formulas have an
'inversely proportional' relation. 
Later we will get back at this LessonUp for a little while.
So you can use what you've learnt in § 7.2!

Good luck!

Slide 10 - Tekstslide

4T Ch 7 on
Friday 31st of January 

Slide 11 - Tekstslide

Theory on Fractional formulas:
See next slide!

Slide 12 - Tekstslide

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More Theory 
See next slide!

Slide 14 - Tekstslide

Slide 15 - Tekstslide

Good luck, doing most of § 7.3.

Slide 16 - Tekstslide

What did you learn this lesson?

Slide 17 - Woordweb