Find the x and y intercepts, then graph?

Question

Find the x and y intercepts, then graph?

 

Y=-x-4

Answer 1

Recognize that the equation is already in "slope-intercept"form
"y=mx+b" where the slope is "m." We can get the y-intercept (0,b)

directly from "b" In the equation as written.  So...

   y-intercept = (0,-4) where "b= -4."

To find the x-intercept, substitute "y=0" into the equation and
solve for "x"....

    y= -x-4
    0= -x-4........substitute 0 for "y"
    4= -x...........add 4 both sides
   -4= x............divide both sides by (-1)
∴ x= -4

So the x-intercept is point with coordinates (-4,0).

 

To graph, plot both intercepts on a graph and draw a line 

through the points.