what is the value of the function y = 2x + 3 ⁢when x=−1 ?

a. 5

b. 2

c. 1

d. −5

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

title is a function is not a function
{(3, , , , 8)}

{(2, , , , 4)}

{(2, , , , 6)}

{(3, , , , 4)}