Which of the following relations is a function? A.{ (-2, 4), (-1, 3), (5, 2), (1, 4) } B.{ (1, 7), (1, 8), (2, 7), (3, 8) } C.{
siniylev [52]
From the pairs of x,y, if the set has two "x" of the same value, that is, "x" repeats, or an x-repeat, then is NOT a function
so, the group that doesn't have any x-repeats, is a function, now let's check
Relative frequency is the number of times that the train is late between the total of journeys, so only multiply 0.15*100 =15 times
Y should equal -7/2 or -3.5
40 units multiply by 6 units equal 240 units