Graph y = -2x - 1

How do you graph the equation  y = -2x - 1 ?

Slope-intercept form is y = mx + b
m is the slope
b is the y-intercept 

rise                         vertical change
------  = Slope  = ----------------------------
run                        horizontal change  

For y = -2x - 1
- put a point at -1 on the y-axis
- from there, since the slope is -2/1, move down 2 and to the right 1 and put another point
- then, draw a line through the two points

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