How do i find the domain and range of a function?

Multiply. write your answer in simplest form. 3/8 x 5/7

1c) the number 131 is a term in the sequence defined by the explicit rule f(n)=5n-4. which term in the sequence is 131? 2a) write the first four terms of the function f(n)=n^2-1 2b) what is the 10th term of the sequence defined by the explicit rule f(n)=n^2-1 2c) the number 224 is a term in the sequence defined by the explicit rule f(n)=n^2-1. which term in the sequence is 224?

In which direction does the left side of the graph of this function point? a(x) = 3x - x2 + 4x - 2