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x₁ = 2 x₂ = 0
y₁ = 4 1/2 y₂ = -2
y-y₁ = x-x₁
y₂-y₁ x₂-x₁
y-9/2 = x-2
-2-9/2 0-2
y-9/2 = x-2
-13/2 -2
-2(y-9/2) = -13/2(x-2)
-2y + 9 = - 13x + 13
2
-2y = -13x + 13 - 9
2
-2y = -13x + 4
2
-y = -13x + 4
b) P(3,0) Q(-1,2)
x₁ =3 x₂ =-1
y₁ =0 y₂ =2
y-y₁ = x-x₁
y₂-y₁ x₂-x₁
y-0 = x - 3
2-0 -1-3
y- = x-3
2 -4
-4y = 2(x-3)
-4y = 2x - 6