Direct variation is not a special case.
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If a variable X is in inverse variation with a variable Y, then it is in direct variation with the variable (1/Y).
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
find the direct variation equation 3x+y=0
Oh, dude, direct variation is when two variables change in the same way. In this case, 5x + 3 = 8y + 3, so technically they are changing in the same way by adding 3 to both sides. So, yeah, I guess you could say it's a direct variation, but like, who really cares, right?
Mathematical Variations are mainly of two types which are: -Direct Variation -Indirect Variation