Answer:
y = - 5x
Step-by-step explanation:
given that y varies directly as x, then the equation relating them is
y = kx ← k is the constant of variation
To find k use the condition y = - 30 and x = 6
k = [tex]\frac{y}{x}[/tex] = ( - 30/ 6) = - 5
hence y = - 5x ← equation of variation
