Which of the sets of ordered pairs represents a function?

a = {(−5, 5), (−2, 2), (2, −2), (5, −5)}

b = {(4, 2), (3, −2), (9, 4), (11, −3)}

An is a number that is written without a component. it is a number that is either or . an exponent is a or a number that another number is being to. the number that is being raised to a is called the . the or power tells you how many times to the base by . if an exponent is fractional then ask yourself the question: what when multiplied by itself a certain number of times will equal the number?