Question

State the domain and range of the following relation.

A. D = {–3, 1, 2, 4}; R = {–3, –1, 1, 2}

B. D = {–3, 1, 2, 3, 4}; R = {–3, –1, 1, 2}

C. D = {–3, –1, 1, 2}; R = {–3, 1, 2, 4}

D. D = {3, –1, 1, 2}; R = {3, 1, 2, 4}

Answer 1

Explanation:

domain (ur x values) = -3,-1,1,2

range (ur y values) = -3,1,2,4

do not have to write them more then once

answer is C

Answer 2

D = {–3, –1, 1, 2}; R = {–3, 1, 2, 4}

Explanation:

• We need to understand what is the domain of a function?

The domain is the set of all possible x-values which will make the function "work"

• We need to understand what is the range of a function?

the range of the function is the set of all values that f(x) = y takes.

In your question,

• all possible x-values : {–3, –1, 1, 2}
• all possible y-values : {–3, 1, 2, 4}

So, the domain and range of the following relation is C

D = {–3, –1, 1, 2}; R = {–3, 1, 2, 4}