SOLUTION: If y varies directly as x, and x = 10 when y = 4, find y when x = 5

Algebra ->  Equations -> SOLUTION: If y varies directly as x, and x = 10 when y = 4, find y when x = 5      Log On

y = k*x

4 = k*10

k = 4/10 = 2/5



So y = (2/5)x



When x=5,  y = (2/5)*5 =