The variables y and x have a proportional relationship, and y = 15 when x = 3. what is the value of x when y = 4?

x =

Step-by-step explanation:

since the variables are in proportion then the equation relating them is

y = kx ← k is the constant of proportionality

to find k use the given condition, y = 15 when x = 3

k = = = 5, hence

y = 5x ← is the equation relating x and y

when y = 4, that is

5x = 4 ( divide both sides by 5 )

x =

i believe the correct answer is b.

the answer is z7+8/5