If y varies inversely as x and y is 2.5 when x is 6, what is y when x is 4?

yvaries as x means y=kx where k is constant y=2.5 x=6 find k 2.5=k6 divide bot sides by 6 2.5/6=k (leave as that an simplfy later) if x=4, what is y y=(2.5/6)*4 y=10/6 y=5/3 y=1 and 2/3