Which set of coordinates represents a function

The 4th table represents a function.

Step-by-step explanation:

A function only gives one unique output for every unique. This means a function f(5) cannot output 6 or 8; it can output only one of these two values.

Looking at the 1st table we see that y(1) gives 1,2,3,4, and 5:  it gives 5 outputs for a single input; therefore, this table cannot represent a function.

The 2nd Table gives three outputs for y(3); this cannot represent a function.

The 3rd table gives two outputs for y(-1): this also cannot be a function.

The 4th table gives a unique output for every unique output for every unique input; therefore, this table represents a function.

answer: the answer is 40.82

step-by-step explanation: 3.14 x 13(or half of 26) to the power of 2

a) justify

step-by-step explanation:

justifying is just part of everyday life. justify kind of means proof so i think the answer is a) justify.