In the equation below, determine whether y varies directly with x. If so, find the constant of variation k.

3y = - 7x - 18

we are given the equation 3y = - 7x - 18 and is asked whether y is directly proportional to x and if it is, we find the constant of variation. In this case, we simplify the equation into y = - 7/3 x - 6. In this case, we can see that y is proportional to x with a constant of proportionality of - 7/3