Answer:
y = 120
Step-by-step explanation:
Given that y varies directly with x then the equation relating them is
y = kx ← k is the constant of variation
To find k use the condition when y = 72, x = 6, then
72 = 6k ( divide both sides by 6 )
12 = k
y = 12k ← equation of variation
When x = 10, then
y = 12 × 10 = 120
