Determine where each relation is a function if it is a function then indicate if it is a linear function

It is a function.
This is because each x value only has 1 corresponding y value.

It is not linear. The difference between y values from each incrememnt of x is inconsistent. The first 3 increase by 0 but the last one increases by 1.

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.