Answer:
y = 8
Explanation:
Given the relationship is direct then the equation relating the quantities is
y = kx ← k is the constant of proportion
To find k use the condition when y = 16, x = 4, then
16 = 4k ( divide both sides by 4 )
4 = k
y = 4x ← equation of proportion
When x = 2, then
y = 4 × 2 = 8