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Q: When two quantities form a direct variation what is it called?

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A direct variation is a situation in which two quantities -- such as hours and pay, or distance and time -- increase or decrease at the same rate. The ratio between the quantities is constant; that is, as one quantity doubles, the other quantity also doubles. so yes it is. -add on- A direct variation is in the form y=ax where a is an 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.

A form of language variation which can develop as a result of isolation is called a DIALECT

If the functional relationship is of the form y = cx where c is the constant of variation. In graphical form, it is a straight line through the origin.

Direct variation refers to two variable quantities have a constant (unchanged) ratio, in which a variable "varies directly with the other."In order to have a direct variation, the constant of variation must be not equal to 0 in the equation y=kx, where k is the constant.When you try to put 2x+3y=0 into that formula (y= form), you get:2x+3y=03y=-2x ;Subtract the 2xy=(-2/3)x ;Divide by 3Your constant of variation is -2/3, and since it is less than 0, it is does variate directly. Therefore, y varies directly as x.

no. direct variation implies that you can simplify the problem into several forma which are equivalent to y/x = k in which k is called the constant of variation. one of these equivalent forms would by y = kx + 0 (slope intercept form) in which the y intercept must be 0 rearranging your equation gives a y- intecept of -14/35 which reduces to -2/5 since this is not zero. this is not direct variation.

Y varies in direct proportion to x.

no. It must be an equation of the form y = kx.

y=x/7 y=(1/7) x It is a direct variation since it is of the form y=kx, where k=1/7 , a constant

y = cx where x and y are the two variables and c is a constant.

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

The question is not clear. But if you want this in the form y=kx, then k must be 1.5

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