How do you graph y=2x?

1 Answer
Jul 30, 2015

Your graph would look like this:
graph{2x [-2.1, 2.1, -5, 5]}

Explanation:

First, you need a starting point. x=0 is a good solution because, when x=0, then y=2*x=2*0=0. Thus, your starting point will be (0;0).

Now, the equation y=2x means that y has an increasing -or decreasing- rate twice as big as x's.
Therefore, every time x will be increased -or decreased- by a certain amount, y will be increased -or decreased- by the double amount.

A few points that this function's curve will pass through:

(0;0)
(1;2)
(2;4)
(-1;-2)