SOLUTION: given that y varies with x, write the linear function relating the two variables. y=8 when x=72 how do i write the linear function.?

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Question 621117: given that y varies with x, write the linear function relating the two variables.
y=8 when x=72
how do i write the linear function.?
Answer by nerdybill(7384) About Me  (Show Source):
You can put this solution on YOUR website!
given that y varies with x, write the linear function relating the two variables.
y=8 when x=72
.
When you see "y varies directly with x" think
y = kx
to find 'k' plug in the given values of x and y and solve for k:
8 = k(72)
8/72 =k
1/9 = k
.
Answer then is:
y = (1/9)x (this is what they're looking for)