Answer:
yes the values in the table are proportional
<span>m=(2y-y1)/(x2-x1) thats your answer</span>
I believe the answer would be D.
Hope this helps!
12+4+9+13+7+11+5+2+_+_ /10= 8
x10 both sides
12+4+9+13+7+11+5+2+_+_=80
63+_+_=80
-63 both sides
_+_= 17
any two numbers that add up to 17 can go in the planks
7,10