Step-by-step explanation:
slope of a line which passes through points (4, -3) and (8, 1) is given by
[tex] \frac{y2 - y1}{x2 - x1} [/tex]
[tex] = \frac{1 - ( - 3)}{8 - 4} [/tex]
[tex] = \frac{1 + 3}{4} [/tex]
[tex] = \frac{4}{4} [/tex]
[tex] = 1[/tex]
