P(1,5)
[tex]y = - 4x + 1 \\ 5 = - 4 \times 1 + 1 \\ 5 = - 4 + 1 \\ 5≠ - 3[/tex]
Q(2, -7)
[tex]y = - 4 x+ 1 \\ 7 = - 4 \times 2 + 1 \\ 7 = - 6 + 1 \\ 7 ≠-5[/tex]
R(1/4, 0)
[tex]y = - 4x + 1 \\ 0 = - 4 \times \frac{1}{4} + 1 \\ 0 = - 1 + 1 \\ 0 = 0[/tex]
Punkt R należy do tej prostej
