Algebra 2 y is directly proportional to x, and y=216 when x=2 find y when x=7

Answer 1

The condition of being directly proportional dictates that

y = kx where k is the proportionality constant. Substituting we get

216 = k(2) So, k = 216/2 = 108 Therefore, when x = 7

y = (108)(7) = 756