For each equation, determine whether x and y are directly proportional (that is, if the equation shows direct variation).
If so, then find the constant of proportionality (the constant of variation).
(a) y=-6x+5
Proportional
Constant of proportionality: k=?
Not proportional
(b) y=(7/8)x
Proportional
Constant of proportionality: k=?
Not proportional
