Can anyone help on these two PRE-ALGEBRA questions see attachments below

1. function

2. not a function

Step-by-step explanation:

1.

Each input value is used only once. It is true that all inputs are mapped to the same output value since every number in the input, 1, 2, 3, 4, 5 is mapped to the same number in the output 3, but that is fine with a function. In a function, each input value can be used only once.

You can list all ordered pairs of this relation:

(1, 3), (2, 3), (3, 3), (3, 4), (3, 5)

Each ordered pair uses a different first element. Since all first elements are different, this relation is a function.

function

2.

Input value 1 is mapped to output value 1.

input value 1 is also mapped to output value 2.

Since one input value is mapped to more than one output value, this relation is not a function.

You can list all ordered pairs of this relation:

(2, 5), (1, 1), (1, 2), (3, 1)

Notice that two ordered pairs have the same first element, 1. This relation s not a function.

not a function

because linear equations are a lot simpler than quadratics equations, and linear equations formula is a lot easier to memorize. that's why i think they're harder.