Determine whether y varies directly with x if so find the constant of variation k. 3y=-7x-18
a- yes; 3
b-yes; -7
c-no
d- yes; 7/3

If y varies directly with x, then a relationship exists in the form y = kx +c
where k =  the constant of variation.

The given relationship is 
3y = 7x - 18
or
y = (7/3)x - 6
Therefore the constant of variation is 7/3.

  D. Yes; 7/3

The correct answer would be d.(0,5)

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