# How do you graph  y = -2x - 7?

Sep 8, 2017

Determine a few sample $\left(x , y\right)$ coordinates using arbitrary values for $x$; plot these points on the Cartesian plane; and draw a line through the points.

#### Explanation:

As an example, I used the arbitrary values $x \in \left\{0 , - 4 , + 4\right\}$
(2 values would have been enough for a straight line relation such as this one, but at least 1 additional point is always a safety check).

{: (color(white)("x")ul(x),color(white)("xxx"),ul(y=-2x-7)), (color(white)("x")0,,color(white)("xxxx")-7), (-4,,color(white)("xxxxx-")1), (+4,,color(white)("xxx")-15) :}

Plotting these points and drawing a line through them should give a graph that looks something like: