# How do you graph y=2x?

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 $y = 2 \cdot x = 2 \cdot 0 = 0$. Thus, your starting point will be (0;0).

Now, the equation $y = 2 x$ 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)