Is it a function and what is the Domain and the Range

3.A.) It is a function

Domain = {-3,-2,0,1}

Range = {0,-4,0,-4}

3.B.) It is not a function

Domain = {0,1,1,4,4}

Range = {0,1,-1,2,-2}

Step-by-step explanation:

Coordinates to 3.A. are (-3,0), (-2,-4), (0,0), (1,-4)

The Domain is the set of input values which are the x values.

The Range is the set of output values which are the y values.

Coordinates to 3.B. are (0,0), ( 1,1), (1,-1), (4,2), (4,-2)

3.B. Is not a function because it has more than one of the same inputs (x values).

A Function cannot have more than one of the same input (x values).

Hope this helps.

not only in mathematics, scientific proof also are required in the other field of science. also maths proofs are of particular structure, containing steps and logics. so proving is like doing science, it is science. that's why it is important to prove. 

an inaccurate proof leads to errors, or stating results that are not accurate.  which wil mess the probelm up you dont want this

a

step-by-step explanation: