Select is a function or is not a function to correctly classify each relation.

{(3, 2), (6, 4), (9, 6), (12, 8)}   is a function

{(2, 3), (2, 5), (3, 6), (9, 4)}    is not a function

{(2, 4), (6, 3), (4, 8), (6, 6)}    is not a function

{(3, 4), (5, 2), (6, 8), (6, 4)}    is not a function

To test if a relation is a function from a set of ordered pairs, you just need to check if each element of the domain is paired with exactly one element of the range. Remember that the domain is all the x-values (first points of each ordered pairs) and the range is all the y-values (second points of each ordered pairs).

Let's test each one of our relations:

{(3, 2), (6, 4), (9, 6), (12, 8)} each element of the domain is paired with exactly one element of the range, so this one is a function.

{(2, 3), (2, 5), (3, 6), (9, 4)}  2 in the domain is paired with both 3 and 5 in the range, so this one is not a function.

{(2, 4), (6, 3), (4, 8), (6, 6)}  6 is paired with both 3 and 6, so this one is not a function either.

{(3, 4), (5, 2), (6, 8), (6, 4)}  6 is paired with both 8 and 4, so this one is not a function either.

answer: the first one

step-by-step explanation: use a calculator and divide the minutes by the dollars.

step-by-step explanation:

the triangles are similar. therefore the corresponding sides are in proportion:

              cross multiply

            divide both sides by 32