what is the equation for x + y = -3

Question

I need (4) ordered pairs

Answer 1

What is the equation for x + y = -3?
I need (4) ordered pairs

 

x + y = -3

 

y = -x - 3     (Subtract x from both sides)

 

This is the equation of a straight line (y = mx + b) with slope (m) of -1 and y-intercept (b) of -3.  To find any point (ordered pair) on the line, simply pick a value of x and use the equation to compute y.  For example:

 

Pick x = 0

 

y = -x - 3

 

y = -(0) - 3 = 0 - 3 = -3

 

The ordered pair is (0,-3)

 

To get 3 more points (ordered pairs), just pick 3 values of x and compute the y.