y varies directly as the square root of x. When y = 29, x = 0.16. Calculate y when x = 0.36. Which of the following would be used to calculate the value of x?

Question

I have no idea how to do this, help me plz.

Answer 1

y varies directly as the square root of x:

this means y is proportional to the square root of x.

 

y α √x

 

or 

 

y = c√x

 

Where 'c' is some constant.

 

plug in the given x and y and solve for c, then you can plug in c and the new x and solve for y.

 

Give it a shot and come back with a question and your attempt at solving this problem if you're still confused.