Podaj wzor funkcji liniowej przechodzacej prez punkty: A=(-3;-1) i B=(2;4).
A(-3,-1)
B(2,4)
(x2-x1)(y-y1)=(y2-y1)(x-x1)
(2-(-3))(y-(-1))=(4-(-1)(x-(-3))
(2+3)(y+1)=(4+1)(x+3)
5(y+1)=5(x+3)
5y+5=5x+15
5y=5x+15-5
5y=5x+10 /:5
y= x+2
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A(-3,-1)
B(2,4)
(x2-x1)(y-y1)=(y2-y1)(x-x1)
(2-(-3))(y-(-1))=(4-(-1)(x-(-3))
(2+3)(y+1)=(4+1)(x+3)
5(y+1)=5(x+3)
5y+5=5x+15
5y=5x+15-5
5y=5x+10 /:5
y= x+2