Question

A equação da reta que passa pelos pontos ( -2 , 5) e b ( 1 , - 3 ) é

Answer 1

y = ax + b --- 5 = -2a + b --- b = 5 + 2a

y = ax + b --- - 3 = 1a + b --- b = - 3 - a

5 + 2a = - 3 - a --- 3a = - 8 --- a = - 8/3

b = - 3 + 8/3 --- b = - 9 + 8 / 3 --- b = - 1/3

y = ax + b

y = ( - 8x - 1 ) / 3 ( reduzida )