Çözüldü Equation of Line Graph

https://i.ibb.co/DHQVzz3C/Avery.png

To earn money for college, Avery works two part-time jobs: A and B. She earns $10 per hour working at job A and $20 per hour working at job B. In one week, Avery earned a total of s dollars for working at the two part-time jobs. The graph above represents all possible combinations of the number of hours Avery could have worked at the two jobs to earn s dollars. What is the value of s ?

A) 128
B) 160
C) 200
D) 320

Based on the graph the equation of the line is A / 16 + B / 8 = 1 ⇒ A + 2B = 16 and for an arbitrary value for B = 5 hours,
A = 16 - 2·5 = 6 Hours
10A + 20B = s
10·6 + 20·5 = $160 = s.

https://blog.sanfranciscobs.com/digital-sat-math-practice-test-hardest-questions/ (question statement is faulty)
https://testbook.com/question-answe...very-works-two-part--66f3e22d4fc66ca220ed7c33 (solution is both faulty and too long)