The value of y varies directly with x. If x=1/2, then y=40. Which of the following equations represents this situation?
1 answer:
Option C: y = 80x is the right answer
Step-by-step explanation:
Varying directly means that the increase/decrease in one quantity will cause increase/decrease in other quantity.
If y varies directly with x it is given by::
y ∝ x
When the proportionality symbol is removed, a proportionality constant is introduced
y = kx
If x = 1/2 and y = 40
then
Putting the value of k, we get
y = 80x
Hence,
Option C: y = 80x is the right answer
Keywords: Proportion
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