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 May 5th, 2017, 10:28 PM #1 Senior Member   Joined: Jan 2017 From: US Posts: 117 Thanks: 6 Y Varies Directly With X Suppose y varies directly with x. If y = negative-4 when x = 1/2, what is the value of y when x =2/3? So, how would I set this up compared to how I would set it up if y was inversely related to x?
 May 6th, 2017, 01:54 AM #2 Global Moderator   Joined: Dec 2006 Posts: 20,302 Thanks: 1971 "y varies directly with x" means that y = kx, where k is a constant. Does that help? Thanks from Indigo28
May 7th, 2017, 12:03 AM   #3
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Joined: Jan 2017
From: US

Posts: 117
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Quote:
 Originally Posted by skipjack "y varies directly with x" means that y = kx, where k is a constant. Does that help?
Yes that definitely helps! I think I had the formulas mixed up.

So would it be:

-4 = k*1/2

k= -2

x= 2/3 k= -2

2/3*-2= -1.3.

So if x= 2/3, does y= -1 3/10?

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