1TH/Vwo §6.5 Comparing graphs

§6.5 Comparing graphs
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Slide 1: Tekstslide
WiskundeMiddelbare schoolhavo, vwoLeerjaar 1

In deze les zitten 23 slides, met interactieve quizzen en tekstslides.

time-iconLesduur is: 50 min

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§6.5 Comparing graphs

Slide 1 - Tekstslide

Let's go through an exercise!

Slide 2 - Tekstslide

exercise 
This graph shows you
 the cost when
 hiring a lawn mower
(=grasmaaier).

Slide 3 - Tekstslide

exercise 
Because 2 graphs are drawn in 1
coordinate system,
we can COMPARE them!

Slide 4 - Tekstslide

exercise
Task 1:
After how many days is the price 
you pay at Praxis 
the same as at Finefix?
Key in in next slide.

Slide 5 - Tekstslide

Task 1:
After how many days is the price
you pay at Praxis
the same as at Finefix?
Key in your answer.

Slide 6 - Open vraag

exercise 
Task 2:
If you hire a lawn mower
 for 2 days, which company is 
 cheapest?
Answer in next slide.

Slide 7 - Tekstslide

For 2 days ....
A
better choose for Praxis
B
it depends
C
better choose for Finefix
D
doesn't matter

Slide 8 - Quizvraag

Explanation exercise ,
Task 2:
If you hire a lawn mower for 2 days, what is 
the cheapest?
1. Go to '2 days' on the horizontal axis.
2. Go up and see which graph is highest.
3. Well, Finefix' graph lies lower,
4. so Finefix is cheapest for 2 days!


Slide 9 - Tekstslide

exercise 
Task 3:
If you hire a lawn mower for 5 days,
which company is cheapest then?
Key in in next slide.

Slide 10 - Tekstslide

For 5 days ...
A
Praxis is cheapest.
B
Doesn't matter.
C
Finefix is cheapest.
D
idk

Slide 11 - Quizvraag

Explanation exercise 32,
Task 3:
If you hire a lawn mower for 5 days,
which company, which is cheapest?
Go to 5 days on the horizontal axis.
Go up and see which graph lies lowest.
Praxis' graph is lowest for 5 days,
so then the price is lowest too! 

Slide 12 - Tekstslide

Slide 13 - Tekstslide

exercise 
Task 4:
Which graph has a fixed amount?
(That is the amount you have to pay, 
no matter how many days they will work
for you!)

Slide 14 - Tekstslide

A fixed amount ...
A
Graph for Praxis has one.
B
No clue at all.
C
Graph for Finefix has one.
D
Both graphs have one.

Slide 15 - Quizvraag

Explanation exercise ,
Task 4:
Which graph has a fixed amount?
The graph for Praxis starts at 10 euros.
That's what you have to pay before you have used 
this carpet cleaner for even one minute!
That's why we call this a FIXED AMOUNT.
The amount is fixed, no matter how long you use it. 

Slide 16 - Tekstslide

Question: What to do first, when making this task ?
ANS

Slide 17 - Tekstslide

First you have to ....

Slide 18 - Woordweb

Solution:
Make a TABLE, indeed!
How else do you know which points lie on the graph?!
However, a TIP for this follows now.

Slide 19 - Tekstslide

This is how the
 SOLUTIONSBOOK does it.
However, why including so may points in the TABLE?
They all lie on the same straight line!
So 3 or 4 points will be enough.

Slide 20 - Tekstslide

In this lesson you have learned .....
I'd much better ASK YOU, what you've learned!
Think of a 'general description' (=algemene beschrijving) for what you learned.


Slide 21 - Tekstslide

I have learnt ...

Slide 22 - Woordweb

Homework time
Make §6.5. You may skip 30.
- correct with Solutionsbook
- take some pics and
- send in the lot in GC

Slide 23 - Tekstslide