which of the following shows the range of the table below
x|y
3|12
5|15
7|21
9|27

a. {3,5,12,15}
b. {3,5,7,9}
c. {5,9,15,27 }
d. { 12,15,21,27 }

Question

which of the following shows the range of the table below
x|y
3|12
5|15
7|21
9|27

a. {3,5,12,15}
b. {3,5,7,9}
c. {5,9,15,27 }
d. { 12,15,21,27 }

anonymous · Answer

The range is the set of y values, so it's that right-side column... 12, 15, 21, 27

Also, if y values are duplicated in the table, you don't have to include them twice - but that's not an issue on this problem.

Finally, "domain" is x values, in case you get a question about that.

anonymous · Answer

ok thanks

anonymous · Answer

which of the following does not represent a function?
a. { (-6,4),(3,-5), (0,-2), (-1,-1)}
b.  x|y
  -2|15
    6|9
  -5|-10
  -2|-6
    3|4

c. y=3x2-2 (FYI-THE first  TWO IS SQUARED)
d. y=4x-3/2

anonymous · Answer

so what is a function?

anonymous · Answer

A function is just a rule that relates the x values to the y values.  However, part of the definition of a function says that it cannot repeat the x values with different y values.  So any table where you have something like x = 3, y = 2  and also x = 3, y = 4  cannot be a function.