2.
which sentence uses commas correctly?
a.
yes my kitty, you are going to have fun!
b.
usually, jin, it is his job to put the trash out.
c.
look this way so that i can see your eyes brianna.
d.
birthday girl come and open the gift, i put on the table.

a is the indefinite article

. a function is a relation in which each input has only one output. in the relation , y is a function of x, because for each input x (1, 2, 3, or 0), there is only one output y. x is not a function of y, because the input y = 3 has multiple outputs: x = 1 and x = 2.