3/5 = .6 and 4/10 = .4, so 3/5 is greater than 4/10
The graph of y = -2 is shown below;
Please observe that y is always -2 for any value of x. Hence the graph is a straight line at the point where you have negative 2 on the vertical axis (y-axis).
I think he lost $375 because I'm pretty sure your supposed to multiply 55 and 7