a. 40 THE ANSWER IS 40
b. x
c. 20
d. f(x)
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y = kx: 10 = 37k so k = 10/37 and y = 10x/37
The equation is xy = 22.5
Suppose the two variables are denoted by X and Y. If Y is a constant multiple of X, that is Y = c*X, then the variation is direct. If the value of X*Y is a constant, that is Y = c/X, then the variation in inverse.
40
y = -5