Answer:
the second one
Step-by-step explanation:
cant be negative cuz if its negative the first line doesnt apply.
It already is rounded to the tenths
.1 is tenth
the answer is 
subtract 6x on both sides → 
divide both sides by -2y → 
Formula for slope is M=y2-y1/x2/x1
Take two points from the graph and insert them into the formula. 13,32 and 7,33 M=32-33/13-7 which equals -1/6 this is already simplified I believe
Answer: -1/6
Sorry if anything is incorrect though.