The slope is denoted by the letter "m".
Formula:
[tex]m = \frac{y2 - y1}{x2 - x1} [/tex]
1.)
[tex]x1 = 4 \\ y1 = 5 \\ x2 = 11 \\ y2 = 9 \\ m = \frac{y2 - y1}{x2 - x1} \\ m = \frac{9 - 5}{11 - 4} \\ m = \frac{4}{7} [/tex]
2.)
[tex]x1 = 4 \\ y1 = 8 \\ x2 = 1 \\ y2 = 5 \\ m = \frac{y2 - y1}{x2 - x1} \\ m = \frac{5 - 8}{1 - 4} \\ m = \frac{ - 3}{ - 3} = 1[/tex]
3.)
[tex]x1 = - 1 \\ y1 = - 2 \\ x2 =7 \\ y2 = 1 \\ m = \frac{y2 - y1}{x2 - x1} \\ m = \frac{1 - ( - 2)}{7 - ( - 1)} \\ m = \frac{3}{8} [/tex]
