Answer:
brainly.com/question/12500028
Step-by-step explanation:
Answer: 8.66666666667
y=3x+6
Coordinate:(-1,3)
Slope: 3/1=3
Formula=y-y^1=m(x-x^1)
y-3=3(x--1)
y-3=3(x+1)
y-3=3x+3
+3 +3