Determine if each of the following relations is a function. Provide a brief explanation. a) {(2, 1), (1, 2), (3, 2), (4, 3), (2, 4)} b) {(4, 4), (-2, -2), (-1, -1), (10, 4)}

a is not a function because it has the x-value/ input of 2 twice

b is a function because it has no multiples of x-values /inputs

Step-by-step explanation:

a) {(2, 1), (1, 2), (3, 2), (4, 3), (2, 4)} is a function, because no two ordered pairs have the same first element.

b) {(4, 4), (-2, -2), (-1, -1), (10, 4)} is a function, because no two ordered pairs have the same first element.

hope it helps :)

mark brainliest!!

answer: c

because if you look at the chart you can see a pattern and compare it to the question he simplify out your

but i think the formula is f(x)=6x

answer: .64

step-by-step explanation

set up the formula for standard deviation for this set of numbers, then simplify