Question

If y varies inversely as x and y is 2.5 when x is 6, what is y when x is 4?

Answer 1

y is proportional to (1/x)

Let y=c/x
where is c is a constant

Given: x=6 --> y=2.5

Plug these values into the equation

2.5 = c/6

c= 6 * 2.5 = 15

So, y= 15/x

When x=4,

y=15/4 = 3.75

Answer 2

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