Hello!
A proportional relationship means the line passes through the origin (0,0) and shows a constant rate of change.
Your answers appear to be correct. Good job! :)
9 games
You can get this by multiplying each percentage by the total number of games to see what they have to expect.
.55*180 = 99 games (red team)
.60*180 = 108 games (blue team)
Now subtract the blue team expectation from the red team.
108 - 99 = 9 games.
1/6 + 3/6 = 4/6
= 2/3
= 0.6 recurring
= 0.6666666667