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
The axis of symmetry of a parabola is the vertical line passing through its vertex. Given a parabola
, the vertex x-coordinate can be found using

In your case, the formula leads to

So, this parabola is symmetric with respect to the line 
Answer:
2n-4
Step-by-step explanation:
You're subtracting 4 from the product of n times 2
Answer: 1,569.75
Step-by-step explanation:
6279÷4=1,569.75
:)