4-1 Linear formulas

Linear formulas
(p. 104)
What you need:
- Textbook, writingbook, iPad
- Pen, pencil, geotriangle
- Calculator

Schoolbags in the cuboard
Phones in the phonebag
Bluetooth
- ON
- VPN off
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Slide 1: Tekstslide
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In deze les zitten 20 slides, met interactieve quizzen en tekstslides.

Lesduur is: 50 min

Onderdelen in deze les

Linear formulas
(p. 104)
What you need:
- Textbook, writingbook, iPad
- Pen, pencil, geotriangle
- Calculator

Schoolbags in the cuboard
Phones in the phonebag
Bluetooth
- ON
- VPN off

Slide 1 -Tekstslide

Lesson goal
Identify linear formulas

Use the standard form for a linear relation y=ax+b

Slide 2 -Tekstslide

Linear relation
If the numbers in the top row are consecutive whole numbers, and there is a fixed increase per step in the bottom row, then there is a linear relation between the variables.

Slide 3 -Tekstslide

Is this a linear relation?
A
Yes
B
No

Slide 4 -Quizvraag

Is this a linear relation?
A
Yes
B
No

Slide 5 -Quizvraag

Which of these are linear relations?
A
1
B
2
C
2 and 3
D
All of them

Slide 6 -Quizvraag

The formula for a linear function

y=ax+b

a is the gradient
b is the y intercept

Slide 10 -Tekstslide

GRADIENT
If the gradient is positive,
the graph is increasing (uphill)

If the gradient is negative, the
graph is decreasing (downhill)

If the gradient is 0, it is a horizontal line.

Slide 11 -Tekstslide

Parallel lines - same gradient
If two lines are parallel, they have the same gradient