Which line is the graph of the equation y=3x

D

Step-by-step explanation:

Lets create a table using the equation y = 3x:

 0  x 3 =  0

  1  x 3 =  3

 2  x 3 =  6

 3  x 3 =  9

This means our coordinate pairs (x,y) will be:

(0,0); (1,3); (2,6); (3,9) ... and so on

Now, if we study the graphs, the line on graph D best represents this function.

This means the answer is D!