The correct answer should be -2.
Because we're reducing - 1/3 by an additional 1 2/3, this makes it -2.
Let me know if you have any other questions :)
You would need to get y be itself to make an equation so you would first subtract 1 from both sides--
Py = Qx - 1
Then you would need to divide both sides by P to have y by itself--
y = Qx-1/P
I would say 10 because the number 10 is used more than the other numbers in.
To calculate the slope, you can use the formula

In this case,

Your slope is 0/3, which does not make sense so there should be something incorrect about your points.
60% The percent of decrease from 15 to 6 is 60% :)