Set it up a direct variation equation. g varies directly as t+2 looks like this: g/t+2=k, where k is the constant of variation. If t=4 and g is 18, then your equation looks like this: 18/6=k. Now find g when t is 9, using your now known k value of 3. g/9+2=3, g/11=3, and g=33
