It just depends. if you are using it on a computer then you’d have to have a equation to be able to have a line. But if you mean on paper then get a ruler and make a line with what ever equation the question has that it wants a line for it.
Answer 2
focus on the picture in the grid by sections. make a grid on your paper, then focus on the individual squares to make the proportions correct. focus on where the live begins and ends in the box, and it will come out pretty good.
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