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Samenvatting Functies van de 1e graad uitleg

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Functies van de 1e graad uitleg

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December 11, 2025
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2
Written in
2025/2026
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Functies van de eerste graad:

y=f(x)= ax + b a≠0

a= richtingscoëfficiënt (aantal stappen naar boven of beneden)

b= snijpunt met Y-as

vb. y=f(x)= 2x-3

X -2 -1 0 1 2
y -7 -5 -3 -1 1


+2 +2 Rico:


F(-2)= 2.(-2)-3

F(-1)= 2.(-1)-3

F(0)= 2.0-3

Tekenschema:

X -∞ 3/2 of +
1,5 ∞
Y - 0 +


Om nulwaarde te bereken:

F(x)= 2x-3

0= 2x-3
+ +
3=2x
:
3/2=x :

Functievoorschrift bepalen met 1 punt en Rico:

Rico: a = -2 (-1,5)

Y=a x + b

5= (-2). (-1) +b

5= 2 +b

3=b

y=-2x +3

Functievoorschrift bepalen met 2 punten zinder Rico:
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