Which relation is a function? A {(-1,3), (-2,6), (0,0), (-2,-2)}
B {(-2,-2),(0,0), (1, 1), (2, 2)}
C {(4,0), (4,1),(4,2), (4,3)}
D
{(7,4), (8,8), (10, 8), (10, 10)}

B is a function

Step-by-step explanation:

All the x cordinates in (x,y) are different.

vbbv

step-by-step explanation:

wholesale price is the initial price before markup. retail price comes after the markup.

a price of 8 bucks that's marked up by 100%   is

formula: initial price + (percent markup in fraction/decimal)(initial price)

8+(1)(8)

8+8

16

retail price is $16.