Question

4) Petrol filled in a tank of a vehical and its cost are in _______ variation​

Answer 1

Answer:

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The petrol filled in the tank of a vehical and its cost are in direct proportion as increase in the amount of petrol filled in the tank of a vehical increases the cost paid for the petrol

Answer 2

The petrol filled in the tank of a vehicle and its cost is in direct variation.  

Explanation:

• Direct variation is referred to the relationship between any two variables.
• Here one of the variables is a constant multiple of the other variable.
• Amount of petrol filled in tank of any vehicle increases with increase in the cost of the petrol.
• Graph plot is observed to be linear, because rate of change is constant.
• The plot or slope passes through the origin (0,0).
• Direct variation can be given by the equation: $y=x$.  
• It is also referred as a direct proportion.
• Change in one variable will automatically cause the othe variable to change.