The graph represents the system of inequalities

Can someone me and do the problem plz so i can understand it more better

Student price tickets to a movie are $1 and non student tickets are $2. 350 tickets are sold and the total amount made is $450. how many non student tickets were sold ? a) 100 b) 150 c) 200 d)250

Give the equations of two different lines that are perpendicular to the line 3x + 4y = 7.