The statements are marked as follows
1. false
2. false
3. true
How to find the truth statement
The y-intercept in the graph represents the profit when no ticket was sold. Hence the statement is false
The money spent before the sale of first ticket is the y-intercept and not the slope.
The x = 40 the line intercepts the x-axis and the y values starts to give positive value. Positive value means profit, hence the statement is true.