How does your model represent the problem? What equations models the problems?

4 + 4 + 4 = 12 3 x 4 = 12

What do the numbers represent in the equations?
Do both equations show three dogs with four legs each?

the first equation is the total legs on one dog being added together with 2 other total dog legs. The second equation is the number of dogs multiplied by the total number of legs on one dog. Either way both equation show 3 dogs with 4 legs each.

slope =   (y2 -y1) ÷ (x2 -x1)

slope = (0 -0) / (-5, -7)

slope = 0 / -12 = 0

the slope of the line is zero.   it is perfectly horizontal.

step-by-step explanation: