Determine which relation is a function. 1: {(-5, 1), (-2, 0), (-2, 2), (3, 4), (6,2)}
2: {(-5, 3), (-2, 0), (-1, 2), (6, 4), (6, 3)}
3: {(-5, 1), (-5, 0), (-2, 1), (-1, 4), (6, 2)}
4: {(-5, 1), (-2, 0), (-1, 1), (2, 4), (6, 3)}

When a whole number is multiplied by 104, how does the placement of the decimal point change? a. it moves ten places to the right. b. it moves four places to the left. c. it moves ten places to the left. d. it moves four places to the right.