A parking garage charges a base rate of $3.50 for up to 2 hours and an hourly rate for each additional hour. The sign below gives the prices for up to 5 hours of parking

The first one, i believe, would be correct. all the others have one thing in common, and that's that they have repeating numbers. in the second one, x and y have repeating 6's and 3's, and in the third, x and y have repeating 6's as well. in the last one, there are repeating 3's. the first one has no repeating numbers.