Question

determine a equaço da reta que passa pelos pontos A (1,1) B (2,4)

Answer 1

$\left|\begin{array}{cccc}x&1&2&x\\y&1&4&y\\\end{array}\right| = 0 \\ \\ x+4+2y-y-2-4x=0=\ \textgreater \ -3x+y+2=0=\ \textgreater \ 3x-y-2=0$