hey guys this question is from a practice exam, i want to know step by step how to answer this, since what i will be asked will be similar, i will apreciate it you set on the side the formulas and other stuff you used to solve so i can look at it as a reference. I appreciate the help.

3) The mean value of a function is defined on the interval [a , blas Sof(x) dx. Find the mean value of f(x) = v5x + 1 on the interval [0,3]