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In her science classroom Jane noticed that the lengths (in inches) and the weights (in ounces) of the class's pet snakes were directly related by the equation y = kx, where x is the length and y is the weight. Use the information in the table to find the weight of a snake that is 12 inches long.
A.25.0
B.27.5
C.30.0
D.32.5

Answer :

beebeebumble
30.0 ounces is correct. Using any pairs of numbers in the table,plug into values for x and y and solve for k.
bcalle
Use one of the ordered pairs that are given to find the value of 'k', the CONSTANT of variation. This number will not change, hence the word 'constant'.
15 = k*6; dividing both sides by 6 we get k = 2.5; The equation used for the table is y = 2.5x
You can find any value now by using this formula.
y = 2.5*12
y = 30

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