Need i need the answer know and explanation

A

Step-by-step explanation:

To find the fraction he has done so far, we need the total number and the amount he has done. The total number (150) goes on the bottom. The amount he has done so far (50) goes on the top. this shows he has done 50 pieces out of the entire 150 pieces. Now, all we do is simplify the fraction. 50/150 is the same as 1/3

sample answer: you can determine whether each element of the domain is paired with exactly one element of the range. for example, if given a graph, you could use the vertical line test; if a vertical line intersects the graph more than once, then the relation that the graph represents is not a function.