Question

For the data in the table, does y vary directly with x? If it does, write an equation for the direct variation.
https://snag.gy/uKvqPY.jpg
A. yes; y = 1.5x
B. yes; y = 2x
C. yes; y = x + 5
D. y does not vary directly with x

Answer 1

To find if it is direct variation, divide each y-coordinate by each x-coordinate. If you get the same number every time, it is direct variation.

Answer 2

So I would do 10 divided by 15?

Answer 3

help me

Answer 4

No.
You need to divide y by x, not x by y.
What is 15/10?
What is 24/16?
What is 30/20?

Answer 5

Oh okay let me do those one second.

Answer 6

1.5, 1.5, 1.5

Answer 7

Wait so then what would it be?

Answer 8

Yes.

Answer 9

A?

Answer 10

@mathstudent55

Answer 11

Correct.
Direct variation has the form

\(y = kx\)

where k is a number.

In our case, we have

\(y = 1.5x\)

Answer 12

Yay Awesome!

Answer 13

I will tag you to answer some more :)