The problem
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Not understanding. How did it get this answer? Doesn’t explain.
Answer provided by our tutors
The 'Graph' tab is showing the graph of the function you type in.
In your case it is 'y = 3x'.
We know that the graph of 'y = 3x' is a straight line thus we need only 2 points from it to draw.
By plugging in the values for 'x = 0' we find 'y = 0' (since y = 3*0 = 0) so we have one point (0, 0).
By plugging in the values for 'x = 1' we find 'y = 3' (since y = 3*1 = 3) so we have a second point (1, 3).
Now, find the points (you can also read the from the graph) and draw the line:
