Vertical angles are congruent due to the fact that they intersect. If they did not, they would in fact be parallel. (last section)
Answer: around 0.0064
i rounded it to the nearest hundred thousandth because the number will keep going on forever.
The residual is the difference between the plotted point and the line of best fit.
We first need to know the point at x=5 for the line of best fit.
y1 = -(5) - 3 = -8
Now we need to find the difference between the line of best fit and the plotted point.
residual = 9 -(-8) = 9 + 8 = 17 or C
We know that 
and 
Substitute in the value. 
Use a calculator to multiply. 
Answer:
Step-by-step explanation:
1) elimination
2) elimination
3)add
4)subtract
5) Variable
6) add
7) eliminate
8) subtract
9) eliminate
10) adding
11) adding
12) 2
13)2
14) 0
15) (2 , 0)
16) (2 , 0)
17) solution
