Find the amount of simple interest earned after 2 years on $480 invested at a 7% annual interest rate?

If y varies directly as x2 and y=6 when x=6, find the constant of variation.

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?

What is the slope of the line shown below?