Slope of the side DA of the rectangle ABCD is 5/3 . What is the slope of the side AB?

Answer: Option D

In given rectangle
Let $$\square$$ ABCD
Angle of rectangle = 90°
AB ⊥ DA
∴ Slope $$\left[{\text{m}}_1=\frac{-1}{{\text{m}}_2}\right]$$   (when lines are perpendicular to each other)
Slope of side DA (m₁) = $$\frac{5}{3}$$
Slope of side AB (m₂) = $$\frac{-3}{5}$$