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) x = y
Proportional
Constant of proportionality: k = 1
(b) y = (7/4)x
Proportional
Constant of proportionality: k = 7/4
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).
7x = y
Not proportional
ax = y
Not proportional