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![class=](https://pl-static.z-dn.net/files/d97/f7a9857547ef572edbfeb8a4fc9be08f.jpg)
c) Punkty (0,-4) i (3,-2).
[tex]b=-4\\a=\frac{-2-(-4)}{3-0}=\frac{2}{3}\\f(x)=\frac{2}{3}x-4[/tex]
d) Punkty (0,3) i (2,4).
[tex]b=3\\a=\frac{4-3}{2-0}=\frac{1}{2}\\f(x)=\frac{1}{2}x+3[/tex]