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

Consider this expression and the steps to evaluate it. 4^5(−2)^9/4^8(−2)^3 1. apply the quotient of powers:      (−2)^a/4^b 2. evaluate powers:           c/d select the value of each variable. a = _ b = _ c = _ d = _