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Svar 2.2:5

a)	\displaystyle y=-3x+9
b)	\displaystyle y=-3x+1
c)	\displaystyle y=3x+5
d)	\displaystyle y=-\displaystyle\frac{1}{2}x+5
e)	\displaystyle k = \displaystyle\frac{8}{5}