Answer:
Step-by-step explanation:
according to the question
7x+x+20=180
=>8x+20=180
=>8x=160
therefore
x=20
Slope is 2/3
What you can do is use the first two coordinates. This would get the formula to look like this:
From here you get ⅔ for the slope.
254 R 6
38942390785289037x34809238749028