Answer: A. Inverse relationship
Explanation: A plot illustrates that as x increases, y decreases - an inverse relationship.
BaCl₂(aq) + Na₂SO₄(aq) = BaSO₄(s) + 2NaCl(aq)
Ba²⁺(aq) + 2Cl⁻(aq) + 2Na⁺(aq) + SO₄²⁻(aq) = BaSO₄(s) + 2Na⁺(aq) + 2Cl⁻(aq)
Ba²⁺(aq) + SO₄²⁻(aq)= BaSO₄(s)
Density = mass/volume
mass of metal =30.2 gram
volume of metal = 22.9-20 = 2.9mL
density = 30.2/2.9 =10.414 gram/mL