y=-x-3 I need help with this not sure

Question

o for y and x

Answer 1

y=mx+c

where m=slopes=-1,c=y-intercept=-3

so the lines slopes downwards and crosses the y-axis at -3

y-intercept: set x=0,,y=-0-3=-3..point[0,-3]

x-intercept: set y=0 0=-x-3 x=-3.point[-3,0]

Answer 2

the equation y=-x - 3 is in standard slope intercept form y=mx + b where b is the y intercept = -3, or the point (0,-3) when x=0, and m= slope = coefficient of the x terms when the linear equation is solved for y.

the x intercept is when y=0

then x= -3 which is the point (-3,0)

set x=0 and you find the y intercept = -3

set y=0 and you get the x intercept =-3

graphically plot those two points (0,-3) and (-3,0) and draw a line through them, That's the graph of the equation, y=-x-3

Answer 3

The answer will depend on what the problem is asking you to solve for...

For example, if it is asking you to solve for the x-intercept then you would set y equal to 0 and solve for x:

   y = -x - 3    

   0 = -x - 3           add x to both sides 

   0 + x = + x -x - 3

   x = -3

Thus, the x-intercept is (-3, 0)