Pentru a afla ecuatia dreptei determinata de 2 puncte vom folosi formula:
[tex]d: \ \frac{x-x_1}{x_2-x_1}=\frac{y-y_1}{y_2-y_1}[/tex]
Aplicam formula exercitiului nostru:
[tex]AB: \ \ \frac{x-2}{0-2}=\frac{y-1}{3-1} \\\\ AB: \ \ \frac{x-2}{-2}=\frac{y-1}{2} \\\\ AB: -x+2-y+1=0 \\\\ \boxed{AB: \ \ x+y-3=0}[/tex]
