1TTO §7.5 Comparing graphs PART ONE

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§7.5 Comparing graphs

This is only PART ONE ... (as in famous Movies)

So there's more to come ...

in the next lesson!

§7.5 Comparing graphs 

This paragraph is done in 2 lessons, because it contains quite a lotta content.

Let's start doing exercise 32 in a little different way from the book.

exercise 32

exercise 32

Because 2 graphs are drawn in 1

coordinate system,

we can COMPARE them!

exercise 32

Task 1:

After how many days is the price 

you pay at Praxis 

the same as at Finefix?

Key in in next slide.

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

exercise 32

Task 2:

If you hire a car for 2 days, what is 

 cheapest?

Answer in next slide.

For 2 days ....

1. better choose for Praxis
2. it depends
3. better choose for Finefix
4. doesn't matter

Explanation exercise 32,

Task 2:

If you hire a car 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!

exercise 32

Task 3:

If you hire a car for 5 days,

which company is cheapest then?

Key in in next slide.

For 5 days ...

1. Praxis is cheapest.
2. Doesn't matter.
3. Finefix is cheapest.
4. idk

Explanation exercise 32,

Task 3:

If you hire a car 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! 

exercise 32

Task 4:

Which graph has a fixed amount?

A fixed amount ...

1. Graph for Praxis has one.
2. No clue at all.
3. Graph for Finefix has one.
4. Both graphs have one.

Explanation exercise 32,

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. 

In this lesson you have learned .....

I'd much better ask you, what you've learned!

Think of a 'general description' (=algemene beschrijving) for this.

So do not mention all tasks but try to summarise the content shortly in a few words.

Homework time

Now make 32, 33, 34 and 35 in your Notebook, as usual:

- correct with Solutionsbook