What is the simplified form of the expression? 3/a-9b

Ineed in figuring out this problem.

Someone answer asap for ! michele pushes a box d meters across a floor. she uses a force f, in newtons, to push the box. she pushes the box for t seconds. the formula p = fd/t calculates the power, p, in watts, that it takes for michele to complete the task. solve the formula for d.

Which graph represents the given linear function 4x+2y=3