Answer:
y = 5
Step-by-step explanation:
Given 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 y = 2.5 when x = 5
k = [tex]\frac{y}{x}[/tex] = [tex]\frac{2.5}{5}[/tex] = 0.5
y = 0.5x ← equation of variation
When x = 10, then
y = 0.5 × 10 = 5
