Give the domain and range of the relation
x y
1 1
4 4
8 1
domain {1,1} range {4,4}
domain {1,4,8} range {1,4}
domain {1,4} range {1,4,8}
domain {4,4} range {8,1}

OPTION B:

Domain: {1, 4, 8}

Range: {1, 4}

Step-by-step explanation:

Domain of a function is the set of all elements that is mapped to an element on the co - domain.

The co - ordinates of the given function are:

1 is mapped to 1.

4 is mapped to 4.

8 is mapped to 1.

This means, the elements {1, 4, 8} will form the domain.

The range is a subset of the co - domain, which have a pre - image.

Here, Co - domain = Range.

Hence, Range = {1, 4}

It is enough to represent the element only once.

Hence, OPTION B is the answer.

4a. is 3 miles every hour

4b. is 1/3 of an hour per mile

step-by-step explanation: