SOLUTION: Y varies directly with X; Y=18.5 when X= 74. What is the constant variation?

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Question 620664: Y varies directly with X;
Y=18.5 when X= 74.
What is the constant variation?
Answer by nerdybill(7384) About Me  (Show Source):
You can put this solution on YOUR website!
Y varies directly with X;
Y=18.5 when X= 74.
What is the constant variation?
.
When you see "varies directly" think:
y = kx
substitute the given values for y and x to find k:
18.5 = k(74)
18.5/(74) = k
7875 = k
.25 = k
.
answer: "constant variation" is .25