wspolczynnik-kierunkowy-prostej-na-ktorej-leza-punkty-aleft-43right-oraz-bleft87right

$a=3$a=3

$a=-1$a=-1

$\displaystyle a= \frac{5}{6}$\displaystyle a= \frac{5}{6}

$\displaystyle a= \frac{1}{3}$\displaystyle a= \frac{1}{3}