y = c*x3 where c is the constant of proportionality.
Y = K (z/x)
4x= y
y = 10x
If y varies directly as x then k = 2.
y = 3x y = 3*19 = 57
Y = K (z/x)
Find an equation of variation where y varies directly as x. One pair of values is y = 80 when x = 40
It is f(x) = 6*x
when x increases y increases.. y=kx
4x= y
y = 10x
one of the measurements to the third power
Z = K Y / X 'K' can be any constant number.
y = 8
40
57
V= x^3