Question

The value of y varies directly with x. If x = 218, then y = 436. What is

Answer 1

Answer:

x = 7

Step-by-step explanation:

To find the value of the value of x when

y = 14 we must first find the relationship between them

The statement

The value of y varies directly with x is written as

$y \: \: \: \alpha \: \: \: kx$

where k is the constant of proportionality

when x = 218

y = 436

So we have

436 = 218k

Divide both sides by 218

k = 2

So the formula for the variation is

y = 2x

when y = 14

We have

14 = 2x

Divide both sides by 2

x = 7

Hope this helps you.