Question

determine a equação geral da reta r que passa pela a origem e pelos pontos (1,5)

Answer 1

$y = ax+b\\\\\ a=\frac{y-y_0}{x-x_0} = \frac{5-0}{1-0}=\frac{5}{1}=5\\\\y=5x+b\\\\(1,5) \rightarrow \left \{ {{y=5} \atop {x=1}} \right. \\\\5=5*1+b\\\\5=5+b\\\\b=5-5\\\\b=0\\\\y=5x+0\\\\y=5x$

Resposta: y = 5x