GUYS PLEASE HELP MY TEST ENDS IN 20 MIN AND I ONLY HAVE 8 QUESTIONS

If f(x)= 3x+6 which of the following is the inverse of f(x)

Erinn wrote the equation –5x + 4y = 32 to represent her hourly wage (y) and how this wage has changed during each year that she worked at a company (x). what is the rate of change in erinn's hourly wage per year?

How many and of which kind of roots does the equation f(x)=2x^4−9x^3+17x^2−16x+6 have?