Iwill give extra points!

1. the owner of the local ice cream parlor says his sales go up and down with the weather. in the above sentence the word sales is the:
a. independent variable
b. dependent variable
c. constant
d. none of the above

2.which of the following statements is true?
a. the dependent variable is represented on the x-axis.
b. the independent variable is also know as the output.
c. the dependent variable is represented in the 2nd column of a table.
d. the independent variable depends on the constant value

8. for the set {(0,1), (-3, 7), (4, 6), (5, 0), (4,8)},

a. state the domain.

b. state the range.

c. is this relation a function? why or why not?