Answer:
y = 5x
Step-by-step explanation:
Given that y is directly proportional to x then the equation relating them is
y = kx ← k is the constant of proportionality
To find k use the condition that y = 30 when x = 6
k = [tex]\frac{y}{x}[/tex] = [tex]\frac{30}{6}[/tex] = 5
y = 5x ← equation of proportion
