Question

For the data in the table does y vary directly with x? If it does write a equation for the direct variation. X-40,28,16. Y-32,16,12

yes; y=2x
yes; y= 0.5x
yes; y= 105x
no; y does not vary directly with x

Answer 1

You are simply filling in the x in the answer choices with the numbers above with process of elimination.

For example:

y=2x
(y)=2(x)
(32)=2(40)
32=80

That isn't true, therefore A is not the right answer. Try plugging the rest in.

Answer 2

can somebody solve this?