Question

12) The relation shown in the table represents the number of various books sold and their total cost. Choose two statements that are true about the relation. Number of books sold, x 1 Cost ($), y 5 A The domain is all real numbers. 2. 6 B The range is {5, 6, 8, 12}. 3 8 C The relation is a function. 4 12 D The cost is the independent variable.

Answer 1

In this problem we have that

Let

x ------>number of books

y ----> the total cost

we have the ordered pairs

(1,5), (2,6), (3,8( and (4,12)

so

Verify each statement

Option A is not true

The domain is the set (1,2,3,4)

Option B

The range is the set (5,6,8,12)

so

the option B is true

Option C

The relation is a function, because for one value of x there is only one value of y

so

Option C is true

Option D

we have that

The cost is the dependent variable and the number of books is the independent variable

so

option D is not true