23. The ___ axis represents the independent variable.

X?

21. Name the set(s) of numbers to which 1.68 belongs.
a. rational numbers
b. natural numbers, whole numbers, integers, rational numbers
c. rational numbers, irrational numbers
d. none of the above

I'm not sure

27. The _____ contains all values of the dependent variable.
a. domain
b. range
c. origin
d. axis

B?

18. Find the domain and range of the relation.

AGE OF PERSON BOOKS READ

65 42
36 37
29 37
29 17

a. domain: (29, 29, 36)
range: (17,37, 42)
b. domain: (29, 29, 36)
range: (37, 37, 42)
c. domain: (29, 36, 65)
range: (37, 37, 42)
d. domain: (29, 36, 65)
range: (17, 37, 42)

D?

3 answers

23, 27 and 31 are correct.
The answer to 21 is a

There is no 31
there is 18

Yes, I meant 18.