Which of the following sets of ordered pairs represent a function? Check all that are true.
{(-3, 7), (-2, 7), (-1, 7), (0, 7), (1, 7)}
{(1.5, 3), (2.5, 3), (5, -3), (6, 2.5), (9, 11)}
{(-27, 15), (14, 2), (37, 0), (14, 15), (-3, 7)}
{(15, -2), (-2, 15), (11, 7), (-4, -4), (10.2, 3)}
{(1, 2), (3, 4), (5, 6), (6, 10), (7, 40)

Select all the correct statements. the amount in dollars an electrician charges in terms of the number of hours worked is represented by the function y = 22x + 42. from the function, identify all the phrases that hold true for the situation. the electrician charges an initial fee of $22 the y-variable represents the number of hours the electrician charges an initial fee of $42 the electrician charges $22 for every hour worked the x-variable represents the electricians charges in dollars the electrician charges $42 for every hour worked

Abiologist is recording the loss of fish in a pond. he notes the number of fish, f, in the pond on june 1. on july 1 there were 63 fish in the pond, which is 52 fewer fish than were in the pond on june 1. which equation represents this situation? a. f – 52 = 63 b. f – 63 = 52 c. 63 – f = 52 d. f – 63 = –52

Does the problem involve permutations or? combinations? do not solve. the matching section of an exam has 4 questions and 7 possible answers. in how many different ways can a student answer the 4 ? questions, if none of the answer choices can be? repeated?