Answer:
19:
[tex]slope = \frac{y _{2} - y _{1}}{x _{2} - x _{1} } \\ \\ slope = \frac{0 - ( - 5)}{5 - 0} = \frac{5}{5} \\ \\ { \underline{ \: \: slope = 1 \: \: }}[/tex]
20:
[tex]slope = \frac{y _{2} - y _{1}}{x _{2} - x _{1} } \\ \\ slope = \frac{19 - 13}{ - 1 - 0} = \frac{6}{ - 1} \\ \\ { \underline{ \: \: slope = - 6 \: \: }}[/tex]
21:
• Considering general equation of a line:
[tex]y = mx + b[/tex]
m is the slope, therefore
slope = -3/5
22:
[tex]slope = \frac{y _{2} - y _{1}}{x _{2} - x _{1} } \\ \\ slope = \frac{15 - 3}{8 - 2} = \frac{12}{6} \\ \\ { \underline{ \: \: slope = 2 \: \: }}[/tex]
