PLEASE HELP ASAP PLEASE​

Find the slope of the line that contains the following points. r(-2, 4), s(6, -2)

What will the graph look like for a system of equations that has no solution? a. the lines will be perpendicular. b. the lines will cross at one point. c. both equations will form the same line. d. the lines will be parallel.

Factor the expression using the gcf. the expression 21m−49n factored using the gcf