Odpowiedź:
y=ax+b
P=(-3, 3)
Q=(4, -2)
[tex]3 = - 3a + b \\ - 2 = 4a + b \\ \\ b = 3 + 3a \\ - 2 = 4a + 3 + 3a \\ \\ b = 3 + 3a \\ - 2 - 3 = 7a \\ \\ b = 3 + 3a \\ - 5 = 7a \\ \\ b = 3 + 3a \\ a = - \frac{5}{7} \\ \\ b = 3 + 3 \times ( - \frac{5}{7} ) \\ a = - \frac{5}{7} \\ \\ b = \frac{6}{7} \\ a = - \frac{5}{7} [/tex]
odp. D
