Find the slope of the line that contains (−1,−2) and (−1,2).

none of these
0
1
−1
undefined

The slope of this line would be undefined.

Step-by-step explanation:

To find this, use the two points in the slope formula.

m(slope) = (y2 - y1)/(x2 - x1)

m = (2 - -2)/(-1 - -1)

m = 4/0

m = undefined.

Since we can't divide by 0, then we know this is undefined.

not only in mathematics, scientific proof also are required in the other field of science. also maths proofs are of particular structure, containing steps and logics. so proving is like doing science, it is science. that's why it is important to prove. 

an inaccurate proof leads to errors, or stating results that are not accurate.  which wil mess the probelm up you dont want this