Find the slope of the line through the pair of points (-4,12) , (-4,11) is it undefined, 1, 0, or -1?

Undefined

Step-by-step explanation:

Looking at the change in x's theres no variation which means this is a vertical line, thus therefore this is an undefined line as the rise over the run or the change in y over the change in x will result in a divide by 0 situation making it (-4, all real numbers) aka undefined.

slope = rise/run = change in y/change in x = (y2-y1)/(x2-x1)

Hope this helps :)

Step-by-step explanation:

596   348

85.1     87