Hello:
Okay, this problem should be taken in a series of steps:
What is the slope's formula?
[tex]\rm\hookrightarrow \frac{y_2-y_1}{x_2-x_1}[/tex]
- (x₁,y₁) -- first point
- (x₂,y₂) -- second point
Okay, now let's use this knowledge
10. (5,-19) and (-5,21)
[tex]Slope = \frac{21--19}{-5-5} =\frac{40}{-10}=-4[/tex]
11. (12,1) and (12, -1)
[tex]Slope = \frac{-1-1}{12-12} =\frac{-2}{0}[/tex]
12. (8,7) and (4,7)
[tex]Slope = \frac{7-7}{4-7} =0[/tex]
Answer:
- Question 10: -4
- Question 11: undefined
- Question 12: 0
Hopefully that helps!
