Question

Y varies directly with x, and y=16
in. when x=8 in.

Answer 1

y= 2x

Explanation:

To figure out what the equation would be you would set up an equation..

16 = 8z

Then you find z

16/8 = 8z/8

2 = z

Now you can set up a variable expression although it isn't necessary

y = zx

Now you plug in the value of z to complete the equation

y= 2x

I hope this is what you wanted!!!