Mrs. Harwell's students are divided into three lunch groups, as shown in the table. Student Lunch Group Micah: early Holly: middle Taylor: early Riley: late Mariah: late If A is the rule that assigns each student in the table to a lunch group, then rule A (is or is not) a function. If B is the rule that assigns each lunch group in the table to a student, then rule B (is or is not) a function.

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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.