Question

Draw the graph of y = 2x + 1, y = 2x and y = 2x - 1/ 2 . Are these parallel?

Answer 1

Answer:

Now I put these points on my graph.

Now you can see the "shape" of the graph. If you have plotted these points accurately and you place a ruler along the points you will see that they all lie on a straight line.

Graph of y = 2x + 1

If you knew at the beginning, from the "form" of the equation that the graph was a straight line then you could have plotted the graph more quickly. In this case you only need to calculate and plot two points and the line joining these two points is the graph.

I hope this helps,

Answer 2

Answer:

Yes the lines are parallel.

Hope it helps you.

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