Answer: 14/15
This is because to get to 14/15 you must divide by 6 but when getting to 42/45 you must divide 2. Therefore 14/15 is your answer because the problem went to the most reduced fraction.
Using the general form; y = mx + b, we get:
y = 4x + 6
If this is in value, you would have $5,060. If you mean bills it would be 560.
Speed = distance/time
so to work out time you do distance/ speed
234/52= 4.5hours