Use the graph to determine which statement describes f ( x ) . A. f ( x ) has an inverse function , because its graph passes the horizontal line test . B. f ( x ) does not have an inverse function , because its graph fails the vertical line test . C. f ( x ) has an inverse function , because its graph passes the vertical line test .

First step is to get rid of the square root. remember that a square root is the same as raising to the (1/2) power. see below: multiply exponents per exponent rules to get: remember you subtract exponents from the denominator and add exponents in the numerator so: simplify further: so a is the correct choice. if you don't understand this google exponent rules and it will you understand. look at the image results.