What are two solutions for 3x-y=0

am i correct on this inorder to graph

(0,0) and (2,6)

Because the line goes through (0,0) so how do i get two solutions from that line?

You can get two solutions from that line because the first solution (0,0) is from the start of the axons x,y , and the second (2,6) is a solution of your equation.
Initially, you find the solutions on x and y, and then draw the line starting from (0,0)