1
4x= y
y = 10x
y = 3x y = 3*19 = 57
If P varies directly with the square of Q then the equation would be in the form of P = kQ2, where k is the constant of variation so the new equation would be: P = 6Q2, so when Q = 12 we have P=6*122, or P = 864
a varies directly as b and a = 12 when b = 4. What is the constant of variation?
2
xy = 8 or y = 8/x
xy = K so K = 21
If y and x are related inversely, then the equation for y can be said to be:y = k/xTo find the constant k, substitute 12 for y and 6 for x (a pair of values that are known to satisfy the equation).y = k/x12 = k/612 X 6 = k72 = kThe value of the variation constant k is 72.
There is only one equation that is given in the question and that equation is not a direct variation.
The equation is xy = 5*9 = 45 Alternatively, y = 45/x
-2
4x= y
y = 10x
Find an equation of variation where y varies directly as x. One pair of values is y = 80 when x = 40
x+y=8 y=-x+8 is not an inverse variation. However, y=8/x is an inverse variation or y varies inversely as x.
40