Question

determine whether y varies directly with x if so find the constant of vartion k
3y=-7x-18
A yes; 3
B yes ; -7
C no
D yes; 7/3

Answer 1

could someone help me with this problem

Answer 2

The slope of this equation is -7/3, which means when x increases by 3 y decreases by 7. This determines how y varies with x. However, none of these are in your options.

Answer 3

okay so it would be D ?

Answer 4

that's the closest and it does vary by that factor, but it should be negative

Answer 5

well the problem doesnt say negative

Answer 6

yeah, now 3y varies with x by -7.

Answer 7

so that means its -7?

Answer 8

I would put D: 7/3 as the best answer.

Answer 9

okay thank you very much :)

Answer 10

yw