Max's lunch account is less than $8.does max owe more than or less than $8?

Is this a polynomial function? i need to know asap

Each person in an it department of 25 people works on at least one of 3 major projects: system security, program implementation, platform development. 10 people work on system security, 13 work on program implementation, and 12 work on platform development. 4 people work on system security and platform development, 5 people work on program implementation and platform development, and 2 people work on all three projects. how many people work on system security and program implementation?

Write two point-slope equations for the line passing through the points (6, 5) and (3, 1)