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Q: Is the direct variation of two variables always a linear function?

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The constant of variation in an http://wiki.answers.com/Q/inverse-variation.html is the constant (unchanged) product between two variable quantities.The formula for indirect variation is xy = k..where k is the constant of variation.The constant of variation in a http://wiki.answers.com/Q/direct-variation.html is the constant (unchanged) ratio of two http://wiki.answers.com/Q/variables.html quantities. The formula for direct variation is y = kx..where k is the constant of variation.

x cm = 3.6 mm1 cm = 10 mm (direct variation, less mm, less cm)x/1 = 3.6/10x = 3.6/10x = .36Thus, 3.6 mm are .36 cm.

cost of direct labor is the total cost of workers involve in production divided by normal capacity is per unit direct labor cost.

Yes conversion cost is sum of direct labor and overheads which required to run the process of production of units.

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yes * * * * * No, it is not. In a direct variation, if one of the variables is 0, the other MUST also be 0. In a linear function, they will be the intercepts.

When two variables are related in such a way that the ratio of their values always remains the same, the two variables are said to be in direct variation. y=2x is direct variation y=x+2 is not direct variation

Any function of the form Y = cX where X and Y are variables and c is a constant.

yes, a graph of a direct variation must pass through the origin because direct variation is always in form of y=mx where x and y are variables and m is a constant.

Two variables, X and Y, are in direct variation if Y = kX for some constant k. The graph of Y as a function of X will be a straight line through the origin.

No.

Yes.

if it passes through (0,0) then it is a direct variation

The slope of the graph of a direct variation is always positive.

No. Direct variation describes a relationship between two variables. It has nothing to do with the value of a single number.

No.

Direct

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