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The value of y varies directly with x. When y = 7, x = 2. what is the value of x when y is 21?

The value of y varies directly with x. When y = 7, x = 2. what is the value of x when y is 21?
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1 vote
The value of y varies directly with x. When y = 7, x = 2. what is the value of x when y is 21?

User Dieter Rehbein
by
8.0k points

1 Answer

5 votes
y=kx
7=k(2)
k=7/2

y=kx
21=7/2(x)
x=6
User Ben Sussman
by
7.8k points
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