You can find the y intercept by plugging in zero for x. Oliver's intercept would be at +2 while Marie's would be at -3. Therefore hers would be 5 units lower, B
For the second one, you know it is growth because the y value is constantly increasing. To find whether the percent of increase is the same, divide the money of month two by month one, month three of month two and month four of month three. In this example it is constantly 5% so the answer is D