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b) y= -4x-2
c) y= x+8
d) y=0,7x+c
a)6/5
b)1/4
c)-1
d-10/7
a=-1/a₁ ( / kreska ułamkowa, * mnożenie)
czyli:
a) y= -⅚x+3
a=-⅚ → a₁=-1/(-⅚)=-1*(-⁶/₅)=⁶/₅=1⅕
b) y= -4x-2
a=-4 → a₁=-1/(-4)=¼
c) y= x+8
a=1 → a₁=-1/1=-1
d) y=0,7x+c
a=0,7=⁷/₁₀ → a₁=-1/(⁷/₁₀)=-1*¹⁰/₇=-¹⁰/₇=-1³/₇