Solution- Direct variation is defined as two variables which increase or decrease at a constant rate. This constant rate is denoted by k.
The equation for direct variation can be written as,
Where x and y are two variables and k is a constant.
Some examples of direct variation in real life are,
Question- How do you find the direct variation equation if y varies directly as x when , ?
From the information provided in the problem,
The equation for direct variation is given as,
On substituting the given values we get
Therefore the equation of direct variation will be represented as,
Thus, the direct variation equation, if y varies directly as x, will be given as .
Question-What are some examples of inverse variation?
Examples of such variation are,
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