The table shows a linear function :)
I think it is F. Because im just guessing.
Money spent + money left over = total money
money spent + 9 = 30
We don't know the price of each shirt, so let x = price of 1 shirt.
Then, 3 shirts cost 3 times as much as x, or 3x.
She spent 3x.
3x + 9 = 30
Well, if we take 68.73 as the 100%, how much is 12 of it in percentage?
well

solve for "x"