If M Varies Directly as X $\frac { 64 } { 3 }$

Multiple Choice

If m varies directly as x and y , and m=24 when x=6 and y=9 , find m when x=15 and y=8 .

A) $\frac { 64 } { 3 }$
B) 60
C) $\frac { 140 } { 3 }$
D) $\frac { 160 } { 3 }$