Resposta :
A) a = 3 - 2 => 1
4 - 2 2
Y = ax + b
2 = 2.1/2 + b => 2 = 1 + b => b = 2-1 => b = 1
Y = 1/2 x + 1
b) a = 4 - (-2) => 4 + 2 => 6 => a = 2
2 - (-1) 2 + 1 3
Y = ax + b
4 = 2.2 + b => b = 4 - 4 => b = 0
Y = 2x
Encontre a equaçao da reta que passa pelos pontos:
a) A( 2,2) e B (4,3)
b) B( -1,-2) e B (2,4)
A) a = 3 - 2 => 1
4 - 2 2
Y = ax + b
2 = 2.1/2 + b => 2 = 1 + b => b = 2-1 => b = 1
Y = 1/2 x + 1
b) a = 4 - (-2) => 4 + 2 => 6 => a = 2
2 - (-1) 2 + 1 3
Y = ax + b
4 = 2.2 + b => b = 4 - 4 => b = 0
Y = 2x