SOLUTION: if y varies directly with x, write the linear function if y=8 and x=4

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Question 738236: if y varies directly with x, write the linear function if y=8 and x=4
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!
if y varies directly with x, then we have a linear function in the form y=kx
if y=8 and x=4, then we have
8=k%2A4
k=8%2F4
k=2
so, your function is: y=2x