Which of the following is an example of direct variation?
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is an example of direct variation?
Definition: A relationship between two variables in which one is a constant multiple of the other. In particular, when one variable changes the other changes in proportion to the first.
So y = kx, where k is a constant.
Anything like that is a direct variation since y is proportion to it.
So here's a example: Cost of filling up a car with gas varies directly with the number of gallons of gasoline that you purchase. If a gallon of gas costs $3.00, how many gallons could you purchase for $18?
x = # of gallons purchased y = cost to fill the car up y = kx 3.00 = k*1
y = 3.00x 18 = 3x x = 18/3 x = 6
I hope that made sense lol.
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