For each equation, determine whether it represents a direct variation, an inverse variation, or neither.
Find the constant of variation when one exists and write it in the simplest form.
The given equation is 21x+3y=0.
Rewrite 21x+3y=0 as follows.
The above equation is observed to be in the form of x = ky.
Thus, the equation 21x + 3y = 0 is a direct variation and the constant of variation is (-3/21).
The given equation is -2x+7y=-3.
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A: The equation is given by,
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