Write an equation of the perpendicular bisector of the line segment whose endpoints are (-1,1) and (7,-5)

y - y₁ = m(x - x₁)
 y - 1 = ⁻³/₄[x - (-1)]
 y - 1 = ⁻³/₄(x + 1)
 y - 1 = ⁻³/₄(x) - ³/₄(1)
 y - 1 = ⁻³/₄x - ³/₄
    +1          + 1
      y = ⁻³/₄x + ¹/₄

11/2.2 = 5 inches for the length 8.5/2.2= 3.86 inches for the width